Probably not something you would see in FGO , since the hosts aren't in control.
If I recall actually, Astrea mentions viewing Ishtar as a rival anyway and says she looks forward to getting her own swimsuit to show her up.
It really doesn't matter who's in the drivers seat; if Luvia and Rin are in the same room they are going to bicker and compete.
These are some sweet-smelling tea leaves.
escaping reality...You have it pretty rough around here, don't you, my apprentice?It sure is noisy outsideA~ra?How cute.What you say?Ah I see, I suppose shabbiness can't be helped---...That's quite a bulky swimsuitDon't get so chummy you bumpkin goddess...