Vapor

"'Now that I am giving up my old life I can definitely say that my love for you will never die...Even well...When I die again' Vapor to Drizzlestar after he begins to split his soul to reincarnate"

Past Arc
Vapor is shown training Mudkit, and his younger Half-sister Vortex. Though he is not commonly shown

Dark Forest Arc
Vapor is first seen training Omega though he does not appear again until Omega attacks a Wishclan patrol. Afterwards he Treasonously pushes his son off of Wishclan's cliff which begins a duel between the two, He blinds Omega's left eye but Omega hauls him off the cliff, which the latter survives.

He is later confronted by Drizzlestar who gets angry with him for corssing, until he asks why his children are in her clan, to which she laughs at the thought of a cat so evil having children. Until she realizes he is being serious.

He appears again walking through Wishclan camp to talk to Drizzlestar which Ravenclaw keeps thwarting, until he pushes through by force. He offers his help to her which she accepts if he can get inside information on the Dark forest. Which he does.

Later Brokeneye and Paleflame go to his den to try and find Silentpaw, to which he responds that he isn't there. Brokeneye recognizing his father, pushes through to find not only Silentpaw, but Drizzlestar, who looks embarrassed to have been caught in the rogues den.

During the fight Vapor is never shown, but afterwards he walks over to Drizzlestar to ask if she is ok, to which she has a sarcastic comment for.