Kendy

Kendy is the het between K.O. and Dendy from the OK K.O.! Let's Be Heroes fandom.

Canon
In "I Am Dendy", it is reaveled that K.O. and Dendy go to the same school. In the same episode, Dendy wanted to observe K.O. for a day to see if they would make out to be compatible friends. In the end, they both found out that they had a common interest, (collecting Pow Cards) which resulted in them becoming good friends.

K.O., despite not always understanding Dendy's intelligent vocabulary, technology, and strategies, still thinks that what she does is really cool and unique. Dendy sometimes does not understand some social norms or figures of speech that K.O. does or say, but nonetheless tries her best to understand him. Overall, despite some of their differences, the two appear to get along really well and enjoy hanging out, playing tag, and sharing/reading Pow Cards with each other.

K.O. tends to seem to enjoy being around Dendy a lot, including at earlier times of day. It is seen in one of K.O.'s videos that he is willing to get up early just so Dendy could show him something. This proves that K.O. would do almost anything for Dendy.

Hints
Though, this could also just have been a Valentine's Day doodle but they could've chosen any other character. So why did it have to be specifically Dendy and K.O.?
 * In the episode short, "Dendy", the two are laying near each other on the ground, and looking up at clouds. Later, Dendy tries to impress KO with her "reality-bending" machine on her hackpack. KO ended up being very impressed, as he was begging her to do it again when it was over.
 * Towards the end of the episode, the both of them are laying on the ground near each other again, and the one thing Dendy is able to imagine up in the clouds, is the both of them together, which makes her smile.
 * In a canon drawing, it shows Dendy and K.O. holding hands with hearts above them. It appears to be in the older art style which may express the fact that Dendy and K.O. were planned to be in some kind of love relationship in the future of the TV show.

Fandom
AO3