Lockster

Bio: The second best underwater thief in the world, able to open many locks underwater no matter the type. Also he has the powers of a lobster while submerged in water.

Powers (when submerged): Enhanced strength, he can regenerate his limbs over the course of several months, ages slowly, hard armor, little need to breath, seismic sense, skilled lockpicking, skilled hacker

Weaknesses: Needs to be submerged in water for these bonuses to take effect.