[GSM]

Kadouha doesn't consume any Ki when used.

[Aqua]

Assuming this is with the Ki awoken active, then I'd be one to say it doesn't consume Ki while active. I've tested this on two different characters and the Ki meter remains at 30.

[Lonestar]

This doesn't consume with either Ki Awoken active or not. Kadouha in general is simply not consuming all of your current Ki.

[Neus]

The skill was changed to remove the Ki Awoken interaction, which broke the ki drain. This has been corrected.