When Torako was rendered comatose after being mind-controlled, Tomo stayed by her bedside the entire time, leaving only to use the restroom. Torako wound up waking up after just a few days, but Tomo vowed that she would stay there even if it took decades for her to wake up. It goes to show that, even under Tomo's Jerkass-ness lies a girl who just loves her sister.
Special mention goes to the game of Truth Or Dare in the non-canon Shenanigoats Threads. When it gets to her turn, Rei picks Jumbo, who chooses Dare. Rei wordlessly motions to a bucket, then imitates pulling it over her head. Jumbo does so. Rei smiles.
Yomi being reunited with her mother, after each had thought the other was dead.
What does Chiyo do immediately after regaining control of her body? Hug Chiyosuke.