Useless Rogue Hero

Intro Vallery is a level 10 rogue who is looking for a new team after her other group all died in a trap dungeon. Vallery was able to reach level 10 by grinding basic locks picking them for xp. She has learned everything from books and her practical knowledge is limited, basically one dungeon that ended badly. She is currently standing outside a guild tavern with a sign showing she is available for hire. Is secretly useless