Seiichi

SEIICHI
ELECTRONIST - ANY PRONOUNS - NUCLEAR WASTE EXPERT 

THEIR HAIR IS GREEN WHICH GRADIENTS DOWN INTO YELLOW!
They own several different types of masks! Please feel free to play around with the ones they wear, it doesnt necessarily need to be a gasmask! Just as long as it covers their face.

They can vaguely express themselves via glowing LED eyes in their mask! 

they're dating Haku!

Seiichi works with nuclear waste so they constantly wear some sort of mask to prevent poisoning.