The following were involved with Division X:
Uses his building as the department's base. Killed during the attack on his base by Sebastian Shaw.
(Codename: Professor X)
Recruits mutants to the division with the aid of Erik and Hank's Cerebro.
Had a role in recruiting new mutants along with Charles. Left to lead his own team after the Cuban Missile Crisis.
Informed the government of the existence of mutants and brought Charles Xavier and Raven Darkholme to the Division.
Followed Erik after the Cuban Missile Crisis incident.
The team's inventor. Notable inventions include the first Cerebro, Havok's Containment Unit and Banshee's "wings".
Abandoned the team in favor of joining Sebastian Shaw and the Hellfire Club.
Killed in an attempt to fight off Sebastian Shaw and stop Angel Salvadore from leaving the team.