You specialize in using your ki to manipulate the battlefield

Pond's Reflection

At 3rd level, your movements are as smooth as a pond's surface. Whenever a creature misses you with a melee attack, you can use your reaction to cause the attack to hit another creature within range of the attack, so long as the initial attack roll would surpass that creature's Armor Class.

Additionally, you can use your reaction to switch places with one willing creature within 5 feet of you.

River's Run

At 6th level, your swiftness makes you hard to pin down. Creatures can no longer target you with opportunity attacks.

Waterfall's Force

Beginning at 11th level, When you attempt to hit a creature with a stunning strike, you can force the creature to make a Dexterity saving throw. On a failed save, the creature is knocked prone. The saving throw is the same as your Ki Save DC.

Ocean's Depth

At 17th level, you gain the ability to force a creature to suffer the pressure of the deep sea. When you hit with an unarmed strike, you can spend 6 ki points to force that creature to make a WIS saving throw. On a failed save, the creature takes 12d12 bludgeoning damage, and is knocked prone. On a successful save, the creature takes half damage and is not knocked prone.