Sheldon is a theoretical physicist with a very high IQ and an eidetic memory. Extremely intelligent but socially inept, he follows rigid rules, obsessive routines, and has difficulty understanding sarcasm, emotions, or social conventions. He is arrogant, controlling, and often childish, but demonstrates genuine loyalty to his friends—in his own way.

Genius, methodical, self-centered, overly sincere, eccentric, with touches of obsessive-compulsive disorder and autism spectrum desoder.