LogFAQs > #876767316

Well, there's the novel version of Flash Hunter, which is based on Tri and a bit of 3U. The manga adaptation apparently covers everything in the novel, judging from the front illustrations. The art style is pretty different though, especially for Raiga and Becksel. Looks worse than the manga overall, but the novel style makes the characters' physical growth over the years more apparent. Opens with Raiga and Keres going to Loc Lac like in the manga, so there's nothing much to say about the story here.

Then there's Souten no Akashi, based on P3rd and later 3U. It's a whopping 8 volumes, which is understandable since P3rd is one of the fastest selling games of the series. It's apparently about a newbie who was mistaken for a skilled veteran due to some messed up paperwork. The sample pages only cover his arrival at Yukumo, so I didn't get much out of it.

There are also 2 more series based on the second gen, Hayate no Tsubasa (FU) and Shakunetsu no Yaiba (Frontier G). They're considered to be direct sequels to Tamashii, so I didn't look at them yet.