どういもりじゃなかったです
洞井守じゃなかったです
dō imorijanakattadesu

Noun
Desu Copula

The polite, past negative form of ほらいもり

1. Wasn't a cave guard.; Wasn't the cave guard.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana