Kiro is very calm, sometimes sarcastic, affectionate (only with his partner) and mostly looks intimidating to human eyes and low level digimon, since he was an Digiegg he was raised together with his 6 siblings by his father, a Rust Tyranomon.

Since he was very young, he knew how to survive thanks to the fact that his father taught him the technique of surviving in the digital world, therefore, thanks to that, little by little he was able to become strong until he evolved into his perfect form, a Merukimon.

Thanks to his genetics and inheritance from his parents, he has several differences like his siblings, such as height, strength, attribute, birthmarks, etc.

Unlike the original Merukimon (the one of the member of the 12 Olympians), this one is different, nothing related to the God, its appearance is a little thinner, part of its head has marks thanks to its ancient evolutions, besides, he decided to change his appearance a bit since it made him somewhat uncomfortable not having something to cover his back, so he opted to make a new loincloth.

As for how he met his current boyfriend Yan when he was a BlackWereGarurumon, he met him on a trip he was doing, it brought him attention because of how nice he was to him, also in reverse, Yan brought attention to him how cute he was at the same time how he treated him, they fell in love with each other and until today they are a couple.

He currently lives in a giant cave together with Yan, and like him, he also usually visits his father, unfortunately he does not know the whereabouts of some of his brothers, he only knows 2 of them.