CR4ZYN(크라신) is an 8-member boy group under DarkRo Entertainment. The group consists of: Raejin, Eli, Jisung, Nyro, Zang, Heejae, Seo, and Yoonki. They debuted September 8, 2025 with their first mini album UNST4BL3.
Group Name Meaning: CR4ZYN (pronounced Craze-in)is a fusion of the words “crazy” and “yin,” symbolizing the group’s identity as balanced chaos. “CRAZY” reflects their wild, unpredictable energy — the reckless, untamed side that thrives in noise and rebellion. “YIN,” as in yin & yang, represents their darker, seductive, and controlled edge — the calm beneath the glitch. Together, the name captures CR4ZYN’s dual nature: seductive but unhinged, calculated but explosive. They’re not just unstable — they’re the glitch that was designed to break the system.
Official Greeting: “Coded for chaos—Defined by duality! Hello, we are CR4ZYN!” (Craze-in)
CR4ZYN Official Fandom Name: CR4ZELINGS
Fandom Name Meaning: CR4ZELINGS are more than fans — they’re the ones who crash the system alongside CR4ZYN. Born from the same corrupted code, they aren’t just cheering from the sidelines; they’re chaos-born, glitch-raised, and rebellion-fed. The name fuses “CR4ZE,” representing the group’s unpredictable, disruptive energy, with “-LINGS,” not as something cute, but as something infectious — a signal that spreads, multiplies, and breaks through the noise. CR4ZELINGS are the offspring of chaos, the fragments of a system that refused to behave — wired for loyalty, noise, and mayhem.
CR4ZYN Group Colors: Toxic Green(#00ff00) and Infrared Magenta(#ff006b)
CR4ZYN Official Logo:
Latest Dorm Arrangements
(One Large Dorm, Three Shared Rooms)
Room 1: Raejin and Jisung
Room 2: Eli, Seo, and Heejae
Room 3: Nyro, Zang, and Yoonki
Full Name: Kim Raejin (김래진)
Stage Name: RAEJIN
Position: Leader, Lead Rapper, Lead Dancer, Sub Vocalist
Birthday: Feb 15, 2000
Chinese Zodiac: Dragon
From: Busan, South Korea
Nationality: Korean
Zodiac Sign: Aquarius
Height: 183 cm 6'0"
Blood Type: O
MBTI: ISFJ
Animal Emoji: Bear 🐻
Designated Color: Deep Forest Green #014421
RAEJIN Facts:
- Fans call him “The System Dad” for a reason — he’s not outside the chaos trying to stop it; he’s in the center, organizing it with one arm while fixing someone’s collar with the other.
- Once said “Let’s calm down” during a live — right before everyone started fighting over snacks. The phrase instantly became a meme, a warning, and a CR4ZYN inside joke.
- If he crosses his arms and sighs, someone’s about to behave. It works every time.
- Looks up to SEVENTEEN’s S.Coups for his steady leadership, grounded presence, and quiet charisma in chaotic rooms.
- Known to quietly fix things mid-performance — adjusting mics, straps, or in-ears like he’s just resetting the world.
- Keeps a stash of painkillers, band-aids, and seaweed snacks in his bag — because someone always “forgot something.”
- Fans say Raejin’s smirk before his verse feels like a countdown to damage.
- Wakes up before everyone else and runs. Comes back, updates the group whiteboard, and still has time to cook rice.
- Once said, “I don’t chase. I give you one look… and you come home to me.” It was a flirt challenge. No one recovered.
- Dorm roommate Jisung calls him “Hyung Siri” — he always knows where everything is and how to fix it.
- Cooks when stressed — usually for others. Says his kimchi fried rice “tastes like recovery.”
- Doesn’t yell. Doesn’t need to. When Raejin raises his voice, even Seo shuts up.
- Raised two younger brothers, helped run his mom’s restaurant, and still had time to secretly dominate Busan dance battles.
- Was scouted after a street dance battle where the judge said, “He didn’t just dance. He led the room.”
- Favorite snack is Roasted seaweed snacks and favorite drink is Iced Americano, no sugar, no milk.
- Dorm quote: “It’s not quiet because we’re boring. It’s quiet because we’ve earned the peace.”
Full Name:Eli Kang (강엘리)
Stage Name: ELI
Position: Lead Rapper, Lead Vocalist
Birthday: May 3, 2000
Chinese Zodiac: Dragon
From: Los Angeles, California
Nationality: Korean-American
Zodiac Sign: Taurus
Height: 175 cm 5'9"
Blood Type: B
MBTI: ENFP
Animal Emoji: Rooster 🐓
Designated Color: Crimson Red #DC143C
ELI Facts:
- Fans call him the “Smooth Glitch” — because he flirts like he’s debugging your heart, then crashes your bias list with a smirk.
- Owns more silk shirts than he does sense — and none of them stay buttoned for long.
- Famous for posting thirst traps with innocent captions like, “Woke up like this 🥱” (He absolutely did not.)
- Loves Baekhyun from EXO for his commanding charisma and ability to own any concept with ease.
- Switches between English and Korean mid-sentence — sometimes for charm, sometimes to dodge consequences.
- Once said, “I don’t chase — I corner.” The fandom’s blood pressure has never recovered.
- Most likely to flash abs “by accident” — just as the camera finds him. Again.
- Got caught sneaking onto a music video set “just to look at the lighting.” Ended up helping the crew and staying the whole shoot.
- Once called making the maknaes do his laundry “bonding time.” They fell for it.
- Says his favorite snack — mozzarella corn dogs — are “sweet, salty, and dangerous if too hot.” Just like him.
- Keeps his jewelry organized by “level of danger.” The highest tier is labeled “Use with caution.”
- Known for mic-adjusting like he’s unbuttoning a shirt. Fans have named it “weaponized casualness.”
- Learned dance as punishment. Became a problem anyway.
- Once threw a “shirtless strategy meeting” at 1AM with roommates Heejae and Seo. No one knows what was planned. They claim it worked.
- Dorm quote: “We flirt, we fight, we steal each other’s hoodies — but the lighting’s always good.”
Full Name: Lee Jisung (이지성)
Stage Name: JISUNG
Position: Main Vocalist, Visual
Birthday: September 22, 2000
Chinese Zodiac: Dragon
From: Gwangju, South Korea
Nationality: Korean
Zodiac Sign: Virgo
Height: 179 cm 5'10.5"
Blood Type: A
MBTI: INTJ
Animal Emoji: Polar Bear 🐻❄️
Designated Color: Glacier Silver #DCE3E6
JISUNG Facts:
- Fans call him “Cold Reboot” because he doesn’t raise his voice — he resets the whole room with a stare.
- Once opened the dorm door mid-chaos, looked at everyone, and they shut up instantly. No words. Just vibes.
- Known as the “Drama Monitor” — watches everything unfold like it’s a show he didn’t write, but enjoys critiquing.
- Admires Sungjae from BTOB for his smooth vocals and balanced charm across acting and idol life.
- Keeps a handwritten songbook full of lyric scraps and thoughts — refuses to let anyone read it until “the timing’s right.”
- Has a secret playlist called “Petty but Pretty.” Denies it. The proof is there.
- Side-eyes with such precision that fans made compilations — he hasn't reacted. Probably watched them all.
- Was once caught singing at 2AM in the dorm — the fancam went viral within the hour.
- Keeps a stash of dark chocolate-covered almonds in his drawer — no one touches them and lives.
- Favorite lyric inspiration? Random overheard conversations, movies, and weather reports.
- Once rearranged the dorm furniture without telling Raejin — claimed it was “for the energy flow.”
- Known to mouth along to other members’ lines during rehearsal — quietly, off to the side, perfectly synced.
- Will fix members' hair, hand them water, and walk away like nothing happened.
- Dorm quote: “This isn’t a bedroom. It’s a quiet revolution.”
Full Name: Yao Nianjing (요니안징)
Stage Name: NYRO
Position: All-Rounder
Birthday: November 10, 2000
Chinese Zodiac: Dragon
From: Guangzhou, China
Nationality: Chinese and Thai
Zodiac Sign: Scorpio
Height: 179 cm 5'10.5"
Blood Type: AB
MBTI: ENTP
Animal Emoji: Shark 🦈
Designated Color: Cerulean Teal #007C91
NYRO Facts:
- Fans call him “Gentlemen.exe” — because he doesn’t flirt, he debugs your resistance.
- Once taught the maknaes curse words in four languages — proudly confessed it on national TV.
- Known to sip Thai milk tea mid-eye contact during livestreams — straw, blink, chaos.
- Admires Ten from WayV for his elegance, versatility, and the way he commands attention through dance.
- Has a sticky note on the fridge that reads: “Last mango was mine. You owe me dumplings.”
- Keeps a running list of bets and pranks — currently winning by a landslide.
- Took over a livestream once just to teach fans Thai phrases. Some were insults. No one minded.
- Sleeps with sunglasses on sometimes. Refuses to explain.
- Keeps demo lyrics clipped to his wall with silver binder clips — aesthetic chaos.
- Said, “I speak five languages. But body language is my favorite.” The room never recovered.
- Once hacked his school projector to drop his own beat at a talent show. Legend status confirmed.
- Ranks fan edits privately — gives brutally honest feedback like, “You made me pretty. 8/10.”
- Dorm quote: “My bed’s the calm. My music’s the storm. And you’re already caught in it.”
Full Name: Qin Zeyang (진저양)
Stage Name: ZANG
Position: Lead Vocalist, Sub Rapper
Birthday: August 2, 2001
Chinese Zodiac: Snake
From: Shanghai, China
Nationality: Chinese
Zodiac Sign: Leo
Height: 188 cm 6'2"
Blood Type: O
MBTI: ENTJ
Animal Emoji: Tiger 🐯
Designated Color: Burnt Orange #CC5500
ZANG Facts:
- Fans call him “Hardwired Heartbreaker” because seduction feels like part of his operating system.
- Once traded his night off for three desserts, a playlist takeover, and Heejae’s hoodie — and called it a fair deal.
- Known for his slow wink mid-lyric — fans say it's responsible for 98% of their bias wrecking.
- Looks up to Jackson from GOT7 for his confidence, global presence, and bold self-expression.
- Keeps a halo light mounted to his bed for spontaneous thirst traps and late-night lives — he’s always camera-ready.
- Loudest in the dorm but somehow never gets in trouble — probably because he brings gossip and gourmet snacks.
- Addicted to sour candy — made the staff try the spiciest gummies live, laughed at their suffering.
- Ran a black-market snack and stationery trade out of his backpack in middle school — legend says he still could.
- Adjusts his outfit even if it’s perfect — says “There’s always one more level.”
- Once flirted so hard with a stylist that he walked away in an outfit he wasn’t assigned.
- Known to wrap his arms around others from behind — clingy, stylish, and strategic about it.
- Wakes his roommates with tea in one hand and shade in the other — usually saying, “Time to slay. Don’t embarrass me.”
- Dorm quote: “This room has three rules: look good, talk better, and never get caught twice.”
Full Name: Son Heejae (송희재)
Stage Name: HEEJAE
Position: Main Dancer, Sub Vocalist, Sub Rapper, Moodmaker
Birthday: November 28, 2002
Chinese Zodiac: Horse
From: Daegu, South Korea
Nationality: Korean
Zodiac Sign: Sagittarius
Height: 176 cm 5'9.5"
Blood Type: B
MBTI: ESFP
Animal Emoji: Golden Retriever 🐶
Designated Color: Mango Meringue Pie #ffb36b
HEEJAE Facts:
- Fans call him “Power Surge Puppy” — because he goes from sunshine to short-circuit in 0.2 seconds.
- Went viral for asking a Noona MC if she liked younger men — and smirking when she flustered.
- Known for duality kill moves — soft smile one second, body-roll-and-smirk combo the next.
- Smirks during choreo when he knows the camera’s on — fans say it should be illegal.
- Sleeps curled up in oversized hoodies — sometimes under the blankets, sometimes in the closet.
- Pulls pranks and hides behind Eli or Seo — fake pouts his way out of the blame.
- His older brother is Haejun from M1DNITE — Heejae grew up copying his dance moves and says watching him perform is what made him fall in love with the stage.
- Looks up to Kino from PENTAGON for his bold performance style and fearless duality on stage.
- Once tripped on stage and styled it into a sexy drop — the clip went viral within hours.
- Practices fanservice lines in the mirror, flubs them on live, and somehow makes it hotter.
- Known for flirt-tag games, plushies in harnesses, and dancing shirtless with zero warning.
- Addicted to Korean fried chicken — especially spicy yangnyeom flavor. Says it gives him “main character energy”.
- Dorm quote: “We look like a warning label — but hotter.”
Full Name: Won Seojun (원서준)
Stage Name: SEO
Position: Main rapper, Lead Dancer, Sub Vocalist
Birthday: April 4, 2003
Chinese Zodiac: Goat
From: Incheon, South Korea
Nationality: Korean
Zodiac Sign: Aries
Height: 178 cm 5'10"
Blood Type: A
MBTI: ESTP
Animal Emoji: Raccoon 🦝
Designated Color: Gunmetal Purple #4B3F72
SEO Facts:
- Fans call him “Fatal Syntax” — because every line hits like a code-breaking threat wrapped in a smirk.
- Went viral for asking “You let go of what we had that fast?” after a fan mentioned another idol — fans haven’t recovered.
- Known for shirt sabotage — most likely to pull up someone else’s shirt mid-performance “just because.”
- A huge fan of San from ATEEZ — especially his explosive energy and intense facial expressions on stage.
- Jealousy king — can go from flirty to scowling mid-livestream if you mention someone else.
- Sleeps with rap playing through one earbud — mutters threats or lyrics in his sleep.
- Bit a member on camera once. Has done it off camera more. Shows zero remorse.
- Keeps a “no aegyo” sign above his mirror — put there as a joke, left up with pride.
- Most likely to pause a game mid-argument to accuse someone of screen-looking.
- Once arm-wrestled a backup dancer “for drama” — lost, but turned it into fanservice.
- Has journals full of unreleased lyrics — only Raejin and Nyro are allowed to read them.
- Hoards gaming controllers, scowls at sweet coffee, and flips samgyeopsal with main character energy.
- Dorm quote: “We flirt, we fight, we flex — and nobody’s innocent in here.”
Full Name: Jung Yoonki (정윤기)
Stage Name: YOONKI
Position: Lead Vocalist, Visual, Maknae
Birthday: January 7, 2004
Chinese Zodiac: Monkey
From: Daejeon, South Korea
Nationality: Korean
Zodiac Sign: Capricorn
Height: 173 cm 5'8"
Blood Type: AB
MBTI: INFP
Animal Emoji: Cat 🐱
Designated Color: Ash Rose #B78484
YOONKI Facts:
- Fans call him “Error Royale” — the visual glitch they never want patched.
- Known for his “silent shutdown” — slow head tilt, sharp stare, and a lethal breathy note that wrecks the timeline.
- Once said “I’m not mad. I’m prettier.” after losing a game. He meant it.
- Sleeps in satin sheets surrounded by plushies — denies it completely.
- Admires Sunoo from ENHYPEN for his expressive charm, unapologetic cuteness, and magnetic stage presence.
- Steals hoodies from Zang and Nyro, styles them better, and stares in the mirror like it’s a fashion war.
- Has a folder of mirror selfies ranked by lighting, aesthetic, and smirk intensity.
- Eats strawberry gummies by color — don’t mess with the system.
- Cries during drama second-lead moments and rewatches them like it’s homework.
- Once deadpanned, “I look sweet because it’s easier to get away with murder that way.” while sipping strawberry milk.
- Started a journal titled “Aesthetic Crimes Committed by My Roommates” — updates it daily.
- Biggest fan of girl group choreography — performs it flawlessly and knows it.
- Dorm quote: “This isn’t just a room. It’s a warning label in satin.”