Anime Profile: Wild Arms Twilight Venom

Sheyenne Rainstorm was a famous gunslinger, because of his rare ability to use the famous ARMS weapons, and a mysterious birthmark that matches both the symbol on ARMS weapons and the symbol of the ancient Evil Race.

After an ambush, Sheyenne is shot, and then wakes up several years later, in the body of a 10-year-old boy, with no memories of how he got there. With the help of tall scientist Kiel Aronnax and the Popepi Pipepo Issac, he searches for clues about his past.

Sheyenne and Kiel eventually meet up with Loretta, a card sorceress, Mirabelle, a Crimson Noble (a vampire-like race), and Jerusha, Issac's Popepi Pipepo ex-wife. These three thieves search for treasure, and while searching accidentally run into Sheyenne nearly every episode. Mirabelle and Loretta where the first to encounter Kiei while they were searching for treasure. Then, while finding the treasure (which so happens to be Sheyenne), they all meet up there before coming under fire. It wasn't until later that the foursome split off.