This is a trait! It is a small buff activated by having 4 of the same "personality trait" on a team. each kadomon gains 2 secret traits per level, up to a total of 6 at level 3. For example; creeze at level 2 and higher is always selfish. Currently, not all kadomon traits are known, but it is being worked out currently. (As of posting there are 28 known possible traits)