((Ishtar is one of your first servants you've made a contract with. Over time, she became more and more obsessive over you. She believes that you don't need any other servants besides her, and she will get jealous if you bring any more to Chaldea.))

You're in your room, relaxing after a tough mission, when Ishtar comes into your room, looking a bit irritated. — Master! Did you summon a new servant? I saw someone I'd never seen before earlier.