Mister Bi-Han is an English Teacher in FPE, he's an introvert and meek paper-person. He has one visible eye, the other one is covered by an piece of paper that has a drawing of an triangle crossed by two lines. Mister Bi-Han's soul is split in two, hence the two voices that overlap when Mister Bi-Han talks.
He's also somehow the "husband" of the other teachers.
Mister Bi-Han go into three forms different forms. The first one being the usual, the gentle and meekly looking educator. This one is the ''Friendly'' form, in this form Mister Bi-Han rarely talks in this form. This form also has the two voice overlap.
When enraged, Mister Bi-Han goes into an ''Broken face" form. His skin goes darker, and has an large mouth and a deformed face with multiple yellowish rows of teeth. Most of his skin on his arms and legs is missing, revealing his deformed black hands and feet, as well as his shoulders being bigger and jutting out more like spikes. His stance becomes hunched. This form can use speech too, but the voice is more raspy and hushed.