Torus is a fusion between two or more Magnitude Fragments. As such, he is not truly a character in his own right, but an amalgamation of people, ideals, concepts, experiences, personalities, and memories. He only appears if the above characters collectively decide to fuse, and lasts however long they remain in-sync.

TL;DR

• DONUT TIME BABEY
• anxiety and grandioseness balance out to form SOMEONE WITH SENSE
• thinks of himself as a "protector" (of what?) i don't know
• prideful and excited of his place, eager to help, impulsive, but a good boy at heart
• decision to fuse was REALLY HEAVY, it took k&d forever to agree to it