History:
Acidic Deluge came from a clan of Kalona that used their wingless half-breeds as the brute ground enforcers. From a young age he ws trained in fighting, his body toughened up every day in order to make his body react better to pain.
He endured it, because that was what was expected. However he was a much more caring enforcer than the others who embraced their more vicious natures.
The clan had a strong fued going with a very nasty purewalker who'd yet to be caught and stripped of their ability to fight. Many a young soul had been lost to this terrible monster, but the higher ups had a plan to eradicate the threat finally. An attack was made, but in order to finally defeat the creature, Acid's squad was bait. Young, inexperienced in real battle, sacrifices to be distracting as the clan triumphed over their enemy.
When he found out that clan betrayed his squad and left them for dead, he was furious. His loyalty shattered to his clan, his comrades torn and shattered before him. He was horribly injured and unable to return to the clan.
If it had not been for a strange sleep deprived mare coming along, he would have surely perished.
At first their friendship was something tenious, but then as he came to understand her more and more, their friendship grew, and he somewhat considers her to be his family, he a younger sibling watching out for his somewhat loony older sibling.