Japanese game developer Cave is known for making frentically-paced and gorgeous-looking “bullet hell” shooters. Nowhere is this more evident than in Deathsmiles, a “Gothic Lolita”-themed shooter that’s headed to the iPhone. The forthcoming iPhone version will get a new character and some unique additional content not found in the previously-released Xbox 360 version.

[ad#Google Adsense 300×250 in story]Cave has added a new character called Princess Tiara, granddaughter of the queen of the land of Gilverado. New designs have been added for characters in the game, courtesy of manga artist Yukiatsu Mori. And Takeshi Miyamoto has been recruited to create new background game music (BGM) for Deathsmiles for iOS.

What’s more, users will now be able to “power up” Princess Tiara by using equipment and items that can be purchased in the game’s shop using gold that Tiara collects on the way. Power up items are also hidden throughout the game, adding a new twist to gameplay.

Cave World producer Masa King has outlined some of the changes coming to the iPhone version in a recent blog post, and a new promotional video has been posted to the Cave World Web site.

A release date has not been announced, but Masa said that Cave will be announcing the release date soon.