Logic over emotion
Writing
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He has two sacred gears in his body, both of which are Twice Criticals.
Stupid concept to be honest. If they can't kill you, they'll kill your family
Obito killed thousands. This guy killed himself
This guy is pathetic, potentially sick. He lacks the ability to control his feelings. According to Chinese novels, he's brought shame to the reincarnation army
My comment might seem harsh, but this guy is pathetic. A man shouldn't be whining or pining for a woman. She rejected you? Go drink a beer and get over it. You loved her for years? It's your fault if you invested too much time in her. Pick yourself up and move. You're a man for crying out loud. If the world won't care, you shouldn't either.
That's the state where he combines the Suppressed form of his Demigod State with nature energy. The resulting energy output is so high that it causes his hair to grow longer. More specific reasons aren't detailed. Either way, bootleg SSj 3 is written in the above paragraph.
In terms of clues, we have no clues. If I remember correctly, it'd take him a thousand years if he never used the Kaioken. 500 years if he used Kaioken x2. 300 and something years if he used Kaioken x3 and so on. We're not told what level of passive multiplier he's keeping on constantly, but it's probably not significant. We are told that Kaioken and Demigod state also amplify his emotions, making him more prone to violent outbursts.
Maybe. We don't know the specific mechanics, but it probably trains the soul like a muscle.