He's an aggressive, introvert and hostile, with selfish behaviors from time to time, being who also shows howsoever no concern for those that aren't close to him, as he had no problem harming other people to reach his goal. Despite his cold self on the outside to strangers, Cross has a soft spot for those who he cares on the inside, since he fell into grief for losing his home and family after obliterating them, and resorted to hunt other universes to blindly "bring them back".