Eternal Sin wrote...
So they're closer to Mashu than Waver I guess?
Well, more like Waver I would say. Ishtar doesn't really look like she appears since she is summoned into Rin's body, therefore they are one in the same.
Mashu is also a "Demi-servant" but special since she kinda fused with Galahad and didn't really summon him into herself.