User blog comment:JoAlter/Stellar Berserker/@comment-4802891-20181010130756/@comment-25848535-20181130043944

Hello Sheepie-san, glad to see you here. Yeah I think his NP is a bit overdone. Stun would be a reasonable demerit because after some serious beating he would’ve been very tired. How about a special Stun where he can’t attack, but he can still use his skills?

He is five stars because he a part of a special series containing only five stars. All the servants in that series has one skill that is related to Crit Star.