Charlie has a split personality, with his two personalities being under the term of his "state of mind." These states have been given names by his siblings, which they have fittingly named his "Passive" & "Aggressive" states.

These states act almost like two completely different consciousnesses when they are active, as they have their own ideals and thoughts on top of their contrasting behaviors. They tend to consistently shift between one another depending on the mood, situation, or circumstance Charlie is presented with. However, that isn't always the case as it's possible for Charlie to shift states randomly, so the causes listed are more of likely factors than guaranteed ones. The only guaranteed time Charlie's state of mind may shift is when he falls unconscious. Whatever state was active before falling unconscious, it shifts to the other one for it to be active and have control of the body so it doesn't go completely limp.

Charlie’s plasma is like electricity; it can shock anyone or anything (that may be affected by electrical currents). He can use the plasma as projectiles, so he can deal long-distance damage without being close up. Another method is through melee combat, which has Charlie charge his energy into a specific point he desires to unleash a current that will transmit into another through the impact he gives to them through the point they designated their energy to. This transmission gives the impact extra damage to be dealt, with the side effect of it hurting the inside of the opponent through the channeling of the nerves. Charlie can also increase the power exerted through his body as it tends to fluctuate intensities depending on how much plasma is generated. This energy Charlie generates can be stored or commonly referred to as "stockpiling." When stockpiled, Charlie can save his stored energy for a later time as it accumulates. It's intended use is for combat, or in Charlie's case self-defense, where he can exert the energy he's stockpiled for a power boost that greatly increases the effectiveness of his damage output.

• Charlie has autism.

• Only when in his Aggressive state, Charlie is shown with a mouth. The only times his Passive state reveals his mouth is during eating, his occasional speech, and to display positive emotion.

• Charlie's favorite snack is marshmallows, often being nicknamed one himself.

• Charlie has purple colored blood. It so happens that his blood is similar to O-type blood, so it can be used for any kind of blood transfusion, including to himself.

• Before canon, Charlie was the only character to be another sexuality outside of being heterosexual, that being pansexual. This of course is no longer the case.

• Charlie possesses the most redesigns out of any character in the series, including being the oldest made.

• Charlie doesn't find most girls attractive.