User blog comment:B214/Volume 23 discussion blog/@comment-86.143.86.100-20170203180136/@comment-86.143.86.100-20170203183657

I just asked because I can only see a couple of ways Isseis's power can improve.

1. Trains his Dragon body to the point of Touki.

2. Trains his underdeveloped Devil powers.

3. Develop is Sacred Gear to gain a Sub-Species and Abyss Side type Balance Breakers.