Her loyalty is def influenced by Dark Fire Tsunade being SO terrible and from then on like. Other Tsunades are okay but only the original, the Classic, will really do.
Gardens aside, I also love Shikako and Tsunade’s post-Hot Springs comradeship. Tsunade bein SO careful and sympathetic when she’s telling Shikako she can’t go out on missions again…. Shikako imagining if she and Tsunade and Sasuke were on a team together Back In The Day…. I love them and I’m emotional