That's Shizuka, not Sakuya.And tbh, you need ninja(they're technically ranged rogue, due to 2/3 of them currently in Nutaku has 50% eva during skill) and after AW, ninja cost go down while Samurai go up, so unless you got Shizuka otherwise Samurai is better if you in need of blocker after your whole team has been deployed and your soldier has no other job to do.