Costume Debut: Halloween 2010
Costume Reprised: Aeternitas 2011, MISTI-Con 2013
For Halloween 2010, Irvin went all-out (as he always does on Halloween). This year, for the first time, he would not only pull together a costume, he would make one! And so, he sewed a robe out of three t-shirts (the first project he's ever sewn!), and proceeded to dye it pink. He was dressed as Gilderoy Lockhart, in the "lurid pink" robes Lockhart wore on Valentine's Day - his only male Halloween cosplay! He then made a new cover for a book so that he could advertise his "new book," Magical Me. And of course, no self-respecting Lockhart would go anywhere without a stack of signed photos. So Irvin printed out about two hundred signed photos of himself as Lockhart, all of them signed in beautiful cursive. He gave these out to everyone over the course of the weekend - his Quidditch teammates, benevolent candy-givers during trick-or-treating, and all the most enthusiastic fans in the Greenwich Village Parade (running out about four blocks before the end of the parade).
As a side note, it's something of a miracle that he didn't catch pneumonia that weekend. That robe was essentially a bunch of light t-shirts, and the following day was spent entirely in pajamas, while it was only a few degrees above freezing point. Warm college classrooms had never seemed so welcoming. But sacrifices must be made to look good on Halloween.
Such an outfit had to be worn again, and so it was at Aeternitas 2011. Irvin wore it Friday evening, and was an absolute sensation. He attended a wizard rock concert, gave out over a hundred signed photos, and engaged in an entire monologue about how much the fans mean to him, and how Aeternitas was a gathering of his fans all about him. It became his signature, the costume many remembered him by.
Because the costume was such a success, Irvin couldn't resist briefly reprising it at MISTI-Con 2013 - the only costume he wore at both cons. He wore it on the final morning, so people could always remember him like that. Also, it was probably the most comfortable outfit he wore all weekend, something many people remarked on.
Once more, many signed photos were given out. Moreover, when he was appointed Deputy Undersecretary to the Minister, he immediately launched into a monologue about how many great ideas he has to run the Ministry before finally being shushed. So committed was Irvin to the character, he even used a highly elaborate Lockhart signature when bidding during a silent auction - this may have contributed to the many items he won!