Sentence

二人は伴侶三人は仲間割れ。

()(にん)伴侶(はんりょ)(さん)(にん)仲間割(なかまわ)れ。
Two is company, but three is none.
Sentence

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。

(べつ)制服(せいふく)着込(きこ)んだ(そと)宇宙(うちゅう)使者(ししゃ)が、伴侶(はんりょ)(もと)めて徘徊(はいかい)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 school uniform and be loitering around seeking a partner.