Ken is a private investigator, or a police officer in the original version. He marries Yolei and has three children: a girl with a Poromon, a boy with a Minomon and a baby boy who has a Leafmon. T.K. mentions that even though Ken is a great detective, he apparently "can't detect when it's time to do the dishes". He is Martin Kratt's mentor.
The Crest of Kindness