別に制服着込んだ外宇宙の使者が、伴侶を求めて徘徊してるわけでもなかろうに。

It's not as if an emissary from outer space will have slipped into uniform and be loitering around seeking a partner.

二人は伴侶三人は仲間割れ。

Two is company, but three is none.