Onechanbara Special on the PSP has five playable characters. You can play the game in multiplayer either locally with a friend or with a computer-controlled sidekick. D3 Publisher recently released a promo video that demonstrates the feature.
Ishaan specializes in game design/sales analysis. He's the former managing editor of Siliconera and a contributing writer at GamesIndustry.biz. He also used to moonlight as a professional manga editor. These days, his day job has nothing to do with games, but the two inform each other nonetheless.