-Absinthe is an easy one: finding her and saving set both of them on a path to having their lives change forever. Following that, Sulfr taking a big attack for Absinthe and her recovery afterwords was the first time Absinthe called her "Mom," a hard thing for her to do, though Sulfr still stands firm that she is not replacing Absinthe's parents, but is carrying on their duty.
-With Vermeil, it was when Sulfr and Provence threw her a birthday party, since it had been so long since she had celebrated it, having been alone for so long.
-With Skol, and this is going to sound silly, it was the time she thought she had gotten good enough at fighting to beat her mom. Sulfr took off her prosthetic and proceeded to hand Skol her ass one-handed. This was when Skol realized how much she had to learn and really started taking her training seriously, and helped her learn how to better control herself.
-Hati.... I'll get back to you on that, she's still very much in progress.