Way better than the Accel manga in both Art and Story. They should do Battle Royale in Kakine's perspective.
If the soul exist , If Heaven, Hell, Asgard, Hel,Elysium,the Pure World and other mythical realms exist as "Phases" in this series then:
Where do Esper Souls go when they die? Do they go to the 'Artificial Heaven'(according to Motaharu) that Aleister is creating? Do they go to Hyouka? Baseless Idiotic Speculation: Are they sealed inside that right hand? Wait are those Dragons Esper AIM soul amalgamations(Similar but different to Hyouka or that AIM burst creature)? Wait is that why 'Angel' went to Kimi? Is the traitor girl part of the Soul Amalgamation making up 'Angel '? But then again Kimi does not release AIM so this theory is already thrown out in the trash