Umi Ryuuzaki is the Magic Knight of Water. Despite being a beautiful and elegant girl, with a tall model-like figure and long, flowing blue hair, she actually has a short temper, and was initially shown to be the most skeptical of the three. Later on, however, between the three Magic Knights, she took on the mantle of the Big Sister and proved to be very protective of her two best friends, Fuu Hououji and Hikaru Shidou.
The Magic Knights do not participate in the MBA storyline.
ArrowKeys - Move
A - Hit the opponent with a sword. 5 hit chain.
A (Hold) - Hit opponent with Mizu no Ryuu, send them flying
A (Hold) + Up Arrow - Hit opponent with Mizu no Ryuu, send them flying above you
A (Hold) + Down Arrow - Hit opponent with Mizu no Ryuu, send them flying below you
Z - Shoots Koori no Yaiba. 3 hit chain.
Z (Hold) - Nothing
X - Mokona shield
X + Up - Teleport in front of opponent (Must be close)
X + Down - Teleport behind opponent. (Must be close)
C - Dash (Use this with arrow keys to Dash)
Q - Move up
W - Move down
D - Change target (Obviously requires multiple opponents)
S - Charge Stamina Bar.
S + A - Transform to Hikaru Shidou/Use Akai Inazuma to hit opponent with red lighting ball. Longer you hold, the more poweful it becomes.
S + Z - Use Aio Tatsumaki to send a whirlwind of water. Longer you hold, the more powerful it becomes. Full charge creates two whirlwinds.
S + X - Transform to Fuu Hououji/Use Imashime no Kaze to bind opponent with wind. Requires full charge.
S + C - Burst mode. Outfit changes to full armour.
S + C + A - Hikari no Rasen. The three knights summon Rayearth. Only on burst mode.
S + C + Z - Fuu uses Imashime to Kaze to bind the opponent. The three knights summon Rayearth. Rayearth attacks the opponent with its sword and the three girl appear inside Tokyo Tower. Can only be used on last bar of HP. Only on burst mode.