Also from the same period, regarding Agatha's missing uncle:
Agatha: Maybe.. maybe he.. he never meant to come back! [Adam places his hand on Agatha's shoulder and firmly shakes his head.] Lilith: Agatha - your uncle loves you very much. Almost as much as we do.
Early in the story between Agatha and one of the Jaegerkin, as Ognian bursts into tears and hugs her, so delighted to have found the master they were looking for. It manages to be touching in a mother-comforting-her-child kind of way, despite being between a mad scientist and one of her family's comic relief monster Henchmen Race. You find yourself going "awww" even though the "child" is over ten times the "mother"'s age, a couple feet taller when he isn't crouching, and has razor sharp teeth.
Agatha loves Zeetha enough to go be stupid. Tarvek cares enough about Agatha to struggle to stop her. Violetta cares enough about Her Lady to stop her. Tarvek cares enough about the cousin who "hates" him, and who he supposedly "hates back", to be frantic that she's going into deadly danger. Violetta cares enough about her role as protector and defender to John Wayne up anyway...when she KNOWS she is a "bad Smoke Knight", and KNOWS Zola has already kicked her butt soundly. And Higgs...Higgs "vas beginning to like" Zeetha. Enough to be devastated for her.
It's a page just chock full of people loving and caring about each other. Each frame is a little jewel of emotional engagement.
Sleipnir and Theo have been giving us loads of these, such as when the ceiling over their workspace is in danger of collapsing—so Theo handcuffs Sleipnir nice and far away.
Sleipnir: If you die I'll hate you forever, you selfish pig!
Another Theo/Sleipnir one—something big is coming for her, but she's still chained to the wall (for her own safety). Theo rushes over, but he can't find the key, so he shields her with his body as the danger approaches.
Vole's observation at the end of that scene adds to the effectiveness. Even he, who considers the recent Heterodyne generations to be unworthy of the name (to the point of wanting to destroy them), doesn't dare raise his hand against Agatha in that moment.
A surprisingly touching one comes from Dupree and Gil. Dupree may be a vicious little psychopath, but she is completely loyal to the baron and always follows his orders if she interprets them in creative ways. When Gil confronts her on abandoning the Baron, she breaks down crying, pointing out that she tried to go back and save him, but failed. Gil comforts her with a hug telling her that if she couldn't save his father, then no one could. Doubles as a Tear Jerker.
The first panel of this update edges into this when Agatha is examining Gil's lightning generators.
Violetta: Did you notice he wrote your name on all the bolts?
Agatha:Obviously he has too much time on his hands...but I thought it was very sweet.
It's been established before that the Wulfenbachs put their name on everything in their machines, the bolts included. This isn't the Spark equivalent of Gil doodling Agatha's name in his notebook, the lightning generators were intended as a gift.
Even sweeter, when Gil saves Vole from the Time Bubble, he rages in pain while aging rapidly, turning huge. She stares for a moment before being overtaken with joy about the development. While we don't know how Vola will think about the situation, she obviously has absolutely no problem with the development.
Professor Mittelmind and Fraulein Snaug's weird twisted Spark-Minion relationship: they honestly care about each other and are just so cute.
Maxina Agatha Gillina Heterodyne Clay. As Adam put it, "When young Wulfenbach sets out to repair something, he doesn't do it halfway." His expression in the top panel is a look seen on many new fathers.
When accused by the Father Abbot of arranging for Lady Selnikov's arrival as part of a master plan, Martellus sincerely denies any involvement, genuinely taken aback at the thought of plotting against a church.
Klaus:Sanctuary or not- I will burn this fortress and every soul in it before I allow you or anyone else to harm my son.
On the romance front, it turns out that Zeetha has a way to send messages to Higgs. At a set time each day, she slowly says a message, which Higgs sees on her circlet crest. The first message we see? I. Love. You.
Gil rescues Tarvek from the time bubble around Mechanicsburg and promptly gives him a huge hug◊. Note when he says "Ha ha! You're fine!" It's in a normal speech bubble, not the hyper-extended spark-use bubble. For a brief moment, he's just Gil again.
In the same vein, Gil also talks normally while Tarvek takes a bath and when he gets the book from Agatha. He can't fight against it all the time, but finding those he cares for interacting with him (in some way) seems to bring him back for a bit.
In Agatha H. and the Clockwork Princess, Klaus describes Punch and Judy as "the two greatest people I have ever known." Heartwarming enough on its own, but more so when you remember that the most obvious people to compare them to would be the Heterodyne Boys, who everyone else sees as the greatest people the world has ever known.