Traumas

>Niko (Red King - Scarlet Rain)
Scared of the world, the closer she gets the more way she discover she can get hurt, so she prefer to keep her distances. that why her avatar is Red Long Range. Also the reason why she can only use the IS the boost Speed and Long Range attacks.

>Chiyuri (Lime Bell)
Hate how her friends (Takumu, Haruyuki) are distancing while they grow, and Wishes to go back to that time in their infancy when all 3 where BBF. That why his Skills are Time Reversal related.

>Haruyuki (Silver Crow)
Always bullied and felling like an hindrance for his friends, he wished to be able to scape far way from from his problems. Thats the root to the flying ability
Note: Black Vise Mention that Metal Color also posses a Repressed Trauma, So its been speculated that Haruyuki Repressed Trauma might be related to his father who left em.

>Takumu (Cyan Pile)
Was bullied from 3rd to 5th grade at his kendo club by his seniors, being restrained by one while others "Practiced" their thrusts on him, (Face and Neck Included). the pile comes from his range and revenge desire "At That Time, I wanted to line up all the guys who bullied me and skewer with and Iron Stake".