Board Thread:General Discussion/@comment-35615238-20190501011054/@comment-37769157-20190501154643

I like to think Chara iand Frisk lie somwhere between Sociopath and Pyschopath.

Antisocial Personality Disorder traits include (most fall under the category if they show three or more of these traits) My Caveat: I noted Frisk in Neutral or Genocide route but if it's a reset and a pacifist route after either one then Frisk would count even in Pacifist.
 * 1) Regularly breaks or flouts the law (Chara/Frisk)
 * 2) Constantly lies and deceives others (Chara/Frisk)
 * 3) Is impulsive and doesn’t plan ahead (Chara)
 * 4) Can be prone to fighting and aggressiveness (Chara/Frisk in Genocide or neutral route)
 * 5) Has little regard for the safety of others (Chara/Frisk in Neutral or genocide route)
 * 6) Irresponsible, can’t meet financial obligations (Chara/possibly Frisk)
 * 7) Doesn’t feel remorse or guilt (Chara doesn't care/Frisk doesn't show emotion positive or negative)

There is not a massive difference in Sociopath and Pyschopath but Sociopaths are known to react more Physically aggressive and Psychopaths tend to be less empathetic. Which makes me lean towards Chara being a sociopath and Frisk the Pyschopath.