DB Shinsei Teen Long-Wei Bio

This is Longwei. Devoted and extremely skilled student of the Kame school under Goku jr. and friend/brother of Goken. 

The Kōatsu is a technique created by his father which is a state of building up ki in your core to unleash it for a future attack or action. The more times ki is built up over time in your core the more powerful the action or attack will be. There are 4 phases of the Kōatsu representing special multipliers that the next attack will be: 5, 20, 50, 100. At level 1 the ki built up will give 1.7x more power to an attack, at phase 2 it will give 3x more power, at phase 3=5x and at phase 4 it 7.5x as much.
    For example, shoot a power beam with the PL of 1000, in the Kōatsu phase 1, the attack power of 1700, the user can switch between phases in battle as long as there is enough ki built up. However without the proper body training, the built up energy could cause the user to burn his body out irreversibly crippling him/her. The amount of time needed to store ki within your core
depends on the user but for a beginner it takes about three days to build up ki for phase 1 and a week for phase 2 and so on. Once phase 1 is activated a novice beginner has about twenty minutes before the power runs out and leaves his/her body greatly damaged and fatigued. Long-Wei first uses this technique when he is in a hard pressed battle against Azera in her Full Power Hera form using Kōatsu phase 2.
There is an advanced level called Chō Kōatsu which allows the user to activate all the phases at the same time granting almost god like abilities, Unfortunately, not much else is known of this level as Zhang-Wei never got around to applying it from theory due to his advanced age and the dangers of such power to others around him.

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Based on the art style of The-Devils-Corpse. They are not I repeat NOT my own design so please check out his gallery.