Aww, King Hassan wants to be loved too.

Not entirely sure about the Chaldea part. Confident about the gist of it, but wording might be better if I had any idea of how the acquisition of servants and the lore surrounding it goes on in FGO.

Catloaf said:

Not entirely sure about the Chaldea part. Confident about the gist of it, but wording might be better if I had any idea of how the acquisition of servants and the lore surrounding it goes on in FGO.

Just use 'summoned by' is fine.