Actually I think I might have themes for each ending of the Hellspawn which seems kinda fitting given the beginning theme was 28 days later - In a heartbeat (like honestly guys it was supposed to be a one-shot... then a two-shot...then... *yikes*). So as it goes then, get ready for my ramblings:
Ending A ( Bastion - Setting Sail, Coming Home *I’ve had THAT scene of Rin standing up and walking away from Yukio to this tune in my head from the day I’ve heard it for the 1st time for some reasons? Both in ending A & ending C after he knocks his brother out so I call it a Rin Okumura theme :’)* )
Ending B ( Les Friction - Dark Matter *Now that I found it, it fits perfectly to characterisation of my OC; person not good but not bad either, but with definite impact to the entire story* )
Ending C ( Les Friction - Firewall (parts 1&2) Position Music - Enter The Void (part3) *This helped me get outta writers block and gave amazing, terrible idea of the consequences that OC would face with her time meddling & also that moment when Rin breaches Gehenna’s Gate and he’s weightless just *UGHHHHH dying whale noises** )
Ending D (It’s definitely going to be Les Friction - I remember/This is a call *for now though I have no opinion about the matter as I didn't start writing it yet!*)