When Keiki is rescued by Youko and sees the recently Heel Face Turned Yuka is with her, and Youko refers to her as "her friend". Made even cuter by Yuka's embarrassed reaction.
Sanshi bringing Taiki back to Mount Hou through a portal looks very much like a mother rescuing her drowning child.
Sanshi's first appearance was this from the start to the end. One of the first things she does when she's born and then told about her duty in life is... going to the tree where Taiki's egg is, getting close to the egg, and hugging it happily while murmuring his name. So cute!