- Real Name: Mizu Suiyoubi
- Identity: Known to the Police
- Category: Mutant
- Citizenship: Citizen of the United States with a criminal record
- Place of Birth: New York City, NY
- Known Relatives: None
- Occupation: Monk, formerly professional criminal
- Group Affiliation: X-Men, Formerly the Sinister Six
- Place of Operations: X-Mansion, Westchester County
Powers: Tsunami is a hydrokinetic, able to manipulate water at the molecular level. He can summon water by taking the moisture and water vapor in the atmosphere to produce water “from nowhere.” He can create waves to ride on, spinning maelstroms, high-pressure water jet blasts to smack enemies, and create huge tidal waves from nowhere that can flip over cars. By manipulating the cohesiveness and surface tension of water, he can create “water weapons,” usually nunchaku or quarterstaffs. He can project water at such high temperature that a stream of it can slice through metal.
Abilities: Mizu Suiyoubi is a skilled Martial Artist who specializes in Tai Chi Chuan and Shaolin Kung Fu. He is skilled in Zen Buddhist philosophy. He is also a former Yakuza gangster with knowledge of lockpicking, security systems, confidence work, and larceny.
Weaknesses: Tsunami’s water powers, based on taking water vapor from the atmosphere, work at reduced effectiveness in unusually dry, desert climates.