るりじゃなかったです
瑠璃蜚蠊じゃなかったです
ruri janakattadesu

Noun
Desu Copula

The polite, past negative form of るりごきぶり

1. Wasn't a cockroach.; Wasn't a jewel beetle.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana