He used to try not to lust after them but was unable to hide his feelings for them and when they mistreated him because of feelings he couldn't control he decided he might as well actually act on them they'd treat him the same either way. Due to his sexual fascination with his well-endowed sisters and mother, he is very lustful and will go to any extent to seduce them. He is very manipulative and uses hypnotism to make his victims more susceptible to suggestion. Jason, despite being the protagonist, is very questionable is terms of morality. Despite this, he is portrayed as being well built in multiple scenes and being attractive in the eyes of his sisters and his mother. Jason is described as having an effeminate physique, with short dark hair.
Though he is the only male in the family, he is by far the shortest, even being beaten by his younger sibling, Sarah.
Jason has very laid back and casual attire, sporting a hoodie and black jeans.