In bleach we all are familiar with the Mod Souls. So I was thinking we should add them here, and this is how it should work.
For soul reapers in a Gigai, an artificial body that allows Shinigami to remain in the Human World and interact with humans, They can use a Mod soul if theywant to temporarily leave the body. When they use the mod soul they the temporary soul in there gigai should have the same stats as the former host/2. Thus making rper control both characters at the same time:
Example:
Random Character
Heath: 500
Reiryoku: 5500
Reiatsu: 110
Attack: 70
Defenese: 90
Speed: 100
Gigai transfer
Heath: 250
Reiryoku: 2750
Reiatsu: 55
Attack: 35
Defenese: 45
Speed: 50