Pyrrhomaniac's passive Aura function is to maintain his youthfulness.
When actively used, Pyrrhomaniac's Aura serves as a super shock-absorber/force-absorber. It is also used as as performance enhancer, boosting various aspects such as strength and speed.
Sometimes in cases of emergency (term is used loosely), he will automatically become invisible at the expense of strength, running speed, and his ability to block (appearing as a shimmer when moving). This seems to be ingrained as a reflex. He will also be unable to use any other Aura ability for the next twenty-four hours. If hit while cloaked, it will cause him to instantly de-cloak.
Note: He can only use one ability at a time. He also has absolutely no other ways of using Aura (for example, he cannot unlock others' Aura or heal).