Saber looked great in a wedding dress, Caster does not see the issue here thank you. But yes, I am liking the sort of grudging acceptance of each other they seem to be developing, even if they are unlikely to be buddy-buddy.

I mean...that scene in Carnival Phantasm where Caster is gushing over how adorable Saber is comes to mind. Saber can totally have Caster fangirling over her / offering to dress her up / make figurines of her whilst she's under the effect of the arrows.

Once the effect fades she will want to never speak of this again but it will be amusing.