Talon Question

So a long time ago, once upon a time in Noxus, Talon killed his friend. Talon murdered his long time buddy Kavyn by stabbing him in the back while he was not looking and tossed his body into a sewer and now I wonder what Kavyn's opinion would be of Talon when he sees him all grown up and pursuing his life long ambitions, rising to success as the top Noxian Assassin, grabbing a hot demacian girlfriend for himself (aka Quinn), and living his life fully in happiness. What do yall think Kavyn would feel if he is overlooking all of this unfold in spirit form? Would he be like, "damn, I wish I was alive so I could enjoy life like Talon is?" Or "well damn, if only I had stabbed Talon first and killed him before he killed me." Would he be jealous of Talon's accomplishments and his future love life etc etc? Would he be furious that Talon's life could have been his own had he been alive? Would he hold a grudge against Talon even after death?

Also, Talon seems like a cold motherfukr, I mean, most people in his position, after a few years, would actually feel the need to apologize to the person they killed by visiting their resting spot because back then they didn't have a choice but Talon even after so many years does not give a crap about Kavyn at all!!!

More importantly, would Kavyn call upon Kalista to aid him since in a way Kavyn was betrayed by Talon?

Can Kavyn's death (being stabbed in the back while he was turned the other way) be seen as a betrayal?

Would Kalista aid Kavyn if he called upon her?