>だが、ギャラハッドは特例だ。
>それは彼がこの世界のゲートキーパーであるが故。
>But Galahad is an exception.
>That's because he's the Gatekeeper of the world.

>世界のゲートキーパー
>sekai no gētokīpā
Was this ever explained? Seems like a pretty direct reference to the Gatekeeper (ゲートキーパー) class. Especially weird considering his actual class was Shielder.