Zekka (絶火, Zekka) is a renowned Space Karate master and one of the most powerful fighters in the Solar System. He joined the Space Karate Forces during the Tenth Zenith of Things Tournament (ZOTT) in ES 591, after which he became the team's de facto leader. (Link)
Powers and Stats
Tier: At least 6-C on his own. 6-A, possibly 5-B with Dragon Slayer
Origin: Battle Angel Alita
Age: Over 90 years old
Powers and Abilities: Superhuman Physical Characteristics, Is masterful in space karate, can counter vibration based attacks, Immortality (Type 1), Regeneration (Mid-Low), heat resistance, use of anti matter
Lifting Strength: Unknown
Durability: At least Island level, likely much higher
Stamina: Very high
Range: At least hundreds of kilometers with Dragon Slayer, likely more.
Standard Equipment: Dragon Slayer
Intelligence: Master of Space Karate
Weaknesses: The Dragon Slayer will kill him and the opponent.
Note: Based on what we know so far, the Dragon Slayer is basically a suicide move, so until more is revealed about this technique, it is simply a special case scenario, hence leaving Zekka's main stats as "At least 6-C".