Phy

A unique seraph. Phy can be rarely found in a plains event, past day 15. The event consist of 3 choices: defend the giant, fight the giant and leave. You get Phy as a reward, if you defend the giant and defeat several low level demon harpies.

Phy is quite powerful in terms of growth. In combat she can dish out damage, heal and support allies. The only hurdle is like most seraphs, she is very weak at the start and requires leveling up, to hold her ground.