www.gameflaws.com/cavestory/characters

What is Cave Story?

A somewhat new sidescrolling game from Pixel. The gameplay plays like a combination of various NES/Famicom games like Metroid, Castlevania, Megaman, Blaster Master, and Monster Mash.

According to the site, Quote is a robot and Curly Brace is his sidekick.
Balrog is some kind of blocky henchman of the bad guy so he is disqualified anyway.

I’d gladly vote for Quote if I hadn’t used up all mine.