User blog comment:Hitsuji Mamoru/Servant Creation Room 2 : Guess of the Who/@comment-4802891-20170313083653/@comment-27971189-20170314150101

I'm quite curious about what he did that he can got Trust skill at EX?

Is he some kind of faithful commander that often act as messenger for many battles? I imagine that's the reason why his horse became famous as well.