[The benefit, as Irisviel sees it, is the chance to bond with her fellow shinki. Their temple of three is an unconventional one. Whether they were brought together by coincidence or due to their connections to the Holy Grail is anyone's guess. So the powers that be have chosen.

Even without memories, there's no removing her compassion and kindness. If they are to live and work together, Irisviel would like to get along with them and take care of them. Someone has to, after all.]

Driving is enjoyable with company, I think, and I would like to know you better. As we're living together and both serving Berserker, shouldn't we be friends?