ラスボスだか魔性菩薩だかなんだか知らねーけど、ウチのカルデアに来た以上はそれで世界救ってもらうからな

I don't know if she's the last boss or the Demonic Bodhisattva, but since she came to Chaldea she'll be able to save the world
<tn>It's probably referring to the true antagonist of Fate/Extra CCC and the FGO Collab Event. Both Kiara versions wanted to provide salvation to the world through pleasure.