All throughout the time in the mountains, Dewy Leaf is snippish with Moon Shadow, and appears to dislike him. Then, when Gray Wing is about to leave, she asks him to tell Moon Shadow that she hopes he's happy. It's really nice seeing that she did care about Moon Shadow.
Throughout their journey to find the Followers of the Sun Trail, Gray Wing has insisted on Jagged Peak eating the food that he catches himself. However, when Jagged Peak brings back a shrew, he only eats part of it, and pushes the rest over to Gray Wing. When Gray Wing protests, Jagged Peak tells him, "We share. It's the proper way." It's a small moment, but is touching nonetheless.
Fox telling Petal that she's better than she thinks she is.
Petal finally having her faith in other cats restored when she meets Clear Sky.
Gray Wing and Turtle Tail become mates at last.
After Clear Sky kicks Frost out of the community, Thunder stands up to him and helps the latter while in exile.
The First Battle
After the harsh titular battle that takes place at the Four Trees, the spirits of cats that had died in the battle show up. Not only that, but the cats that died before arrive. Including Turtle Tail, Shaded Moss, Storm, Jackdaw's Cry, Falling Feather, and much more.
Gray Wing tries his best to comfort Wind Runner after Emberkit dies. She snaps at him and wishes grief on him...only to apologize for it chapters later. Gray Wing forgives her. Awww.