Despite all the deceptions, Beerain (posing as Lady Noia) bandaging up Lumen's injury after inadvertently causing it. It was surprisingly sweet considering it's well...Beerain.
Episode 27 shows that while Grasshop messes up (a lot) his family and colleagues still appreciate him. I think his wife put it best.
Weevil: He maybe a goof, but he's my goof.
If you don't feel bad for Beerain when Buguese practically attacks her in episode 44. Then you have got to be one of the Beerain haters, cause even Grasshop was nice to her after that. Considering how she treated him all those times before. He's even able to get her laughing again, which is nice to see.
Speaking of Grasshop, just about all of him and the Princess Sparkle moments in the episodes "Grasshop’s Misfortune" and "Spies and Lies" are moments of heartwarming.
Sparkle: Hotarla, I don't think that Uncle Hop likes us, not anymore.
Grasshop: How could anyone dislike you.
And then there was that time in episode 49 when he literally got on his hands and knees before and Axe Crazy Mantid thinking it might help the Spider Riders.
Grasshop: I beg you to listen to my plea. I have lived with the Spider Riders for a while and learned that contrary to popular belief, there not mean and greedy. There actually pretty nice and want everyone to be happy and live in peace. They share food and help others who are in need or being attacked. They're really not bad, for humans. Please, you can do whatever you want with me, just spare there lives.
Grasshop debating what he should do to stop Buguese and Aqune from stealing the Oracle Key. Just the fact that he still wants to save the humans despite his fear is heartwarming.
Grasshop: This hero stuff is hard!
When the Oracle used her influence to save Beerain from the mind controlled Aqune in "Fly no Longer". I mean sure, we'd been told from the begining that the Oracle treasures all life in the Inner World. But this was the first bit of sold proof that yes, Spirit Oracle will do everything in her power to protect all life. Including Invectids.
Hunter and Shadow confronting Buguese while being Mantid's guests in episode 46. Then telling him they're willing to believe in him. The gesture of trust actually leaves Buguese momentarily stunned.
Buguese: (thinks to himself) Can it be, my enemy trusts me more than my master?
Aqune even smiles at the conversation.
How can this list not include the scene from episode 49 where Buguese finally releases Aqune? Complete with Cooldown Hug and his thinking back about his regret, it was just touching.
But the "CMOH" goes to Mantid himself. That's right, Mantid. It's really best in the dub actually. He pops out of the portal fully human and the first thing he does is rush into Lorraine's arms. If seeing THAT doesn't make you at least misty-eyed, well you have no soul.
Mantid: I feel like I'm waking from a long dark dream Lorriane. Lorraine: It's over now.