Kai Green

Kai Green is Ben love interest in Benwolf. Kai is the granddaughter of Wes Green, a friend and former partner of Grandpa Max. She first appeared doing a spiritual dance in the episode Benwolf. She was Ben's first crush, but she only took interest in him after he started becoming Benwolf because she wanted to, as quoted, "train and tame him". She did have an interest in him before he turned into Benwolf but the interest was about the Omnitrix. When she admitted to this, Gwen gave her a stern talking to. She made a cameo appearance in Ben's dream world in Perfect Day as a cheerleader. She appeared as Ben's wife in Ken 10.