The Sekaiju no Meikyuu game series has spawned several doujins (self-published books) ever since the first game was released. However, there is also an official manga for each game up to Etrian Odyssey III.
Sekaiju no MeikyuuEdit
Based on the first Etrian Odyssey game.
Sekaiju no Meikyuu II: Rikka no ShoujoEdit
We are shown bits of flashback of her early years and training, and see how she slowly gathers comrades and forms a guild. The most prominent character apart from her is the primary male Ronin.