From Mental Block

Akikan! (アキカン!, lit. Empty Can!) is a Japanese light novel series about a group of anthropomorphic drink cans who do battle. It was created by Riku Ranjō, with illustrations by Hiro Suzuhira, known for her artistry in Shuffle!. An anime adaptation by Brain's Base began airing between January 3, 2009 and March 28, 2009.

Shockingly! The Strongest Akikan (Episode 11)[edit | edit source]

A possessed Budoko shows up and fights Yell, but she is defeated when the mysterious Akikan takes a shot at Najimi, and then absorbs Yell. Kizaki explains that the attacker was 'the strongest Akikan' who attacks Akikans regardless of being steel or aluminium. Later, Melon gets attacked by Yell and Budoko, who Kakeru deduces are copies.