Her hands tightens around the phone. Of course she knew about a geis. It was a terrible class of curse, but this is the first time she has heard of one strong enough to subdue a Servant. And even more astounding is the fact Cu Chulainn would have submitted to such a geis.

"I see. I would assume that such a person is your ally?"

It is the only logical conclusion. Neither Cu Chulainn nor Diarmuid could have allowed this spell to take effect unless the caster was someone they both trusted.

"Congratulations on improving your control. And pass this congratulations on to the caster if you can still contact them. This makes both our jobs much easier."