Ahh a song fic! You excel at these.
I have no idea what's happening in the show so I don't know how this fulfils canon but it's (as always) beautifully written.
I can tell you've chosen your words with care, so your prose almost ends up being poetic. I'm glad that this is from Shiva's PoV because I think it was needed.
One thing that stood out to me is Shiva feeling brave when Raavi is asleep, it's such a wonderful thought, and you really seem to have delved deep into this character.
Sorry, I really enjoyed it but I can't think of what else to say other than it's beautiful and poignant. Also, because I'm feeling extremely vulnerable and attacked and defensive right now so not the best frame of mind for an objective review.