User blog comment:Hitsuji Mamoru/FGO-style Servant Creation Room/@comment-4802891-20170129055322/@comment-4802891-20170129115647

I guess he would be quite broken in a real HGW as well... but thankfully, since he has no business with the Holy Grail, there are very low chance he would answer to a random summon (can a Heroic Spririt avoid being summoned?)... I mean, he got screwed hard for asking a power he has no understanding of, he would be unwise to try again. I don't think he would help the Master either, except under a Command Spell.