Vesper gives Eddie a wrench painted to look like him because they've bonded in episode 3.
Eddie reassuring Vesper in episode 6, leading to Vesper asking him on a date.
The group hug after freeing Vesper from mind control in episode 7.
Santa telling Vesper she's perfect just the way she is.
Eddie talking about how while the team may all have lost important things, they've got each other and they're all important to each other.
When Jack makes a comment about not having a family to go back to in episode 16, Vesper immediately invites him to meet her family.
Jack telling Vesper's family about how great she's been as a Ranger.
Vesper saying the rest of the Rangers are a second family for her.
Marv comforting Eddie in episode 18, ending with Marv telling Eddie that he's like a brother to him.
An odd example near the end of Episode 21 as Lord Drakkon shows remorse for the death of one of his Red Sentries, remarking "Poor Georgie." For a guy like Drakkon, that's not nothing.