Signature moves:

Akira - Blood Barrier

By hardening the blood inside his body to be as strong as iron, Akira can withstand most killing blows with nothing more than cosmetic damage. However, he can only activate this ability for a fraction of a second because it stops his blood from flowing.

Akuma - Blood Destruction

If Akuma can get his blood inside of another person and touch them, skin to skin, he can cause that person's blood to burn them like acid, killing them slowly and painfully.