jealous person
Refers to a person who is prone to jealousy, especially in romantic contexts. Often used in a slightly teasing or critical way.
He's a jealous type, so he gets sulky as soon as she talks to another guy.
うちの猫はやきもち焼きで、他の猫を撫でると怒る。
Our cat is jealous and gets angry if you pet another cat.