Two ideas:
1) A deity that represents wisdom, introspection, and outer strength through inner strength. Deity is often seen or described as riding silently cross-legged on the back of a giant turtle (whether it be land or river/lake/sea), arms folded, both eyes closed. Most good people that feel like "wallflowers" relate most with this deity.
2) A deity that is like Gilean from the Dragonlance lore. (Actually, most of those deities could be used or mixed/matched.)