How hot is Scáthach? This is one of her skills:

Beach Crisis: A+ A skill that demonstrates how much attention she can get at the beach. Different from Beach Flower, the skill manages to get people to gaze at her with deep yearning. There is a danger that Scáthach will plunge the beach into chaos just by walking down to it.

The queen of the Land of Shadows, Scáthach, the mentor of heroes... that is who we are dealing with, but this time Scáthach took the opportunity to change into swimsuit with the excuse that it is appropriate for the setting. Using runes to solve all problems, Scáthach is the first summer Welfare servant and honestly a pretty good early game servant, if you have the right supports.