One of the first signs that Luviagelita Edelfelt is, for all her hauteur, not as cold a magus as she pretends comes when Gray and El-Melloi II first walk in on her in her sleepwear. As soon as she sees them, her composure disappears, replaced with embarrassed anger, and she swiftly hides a stuffed toy from view. Despite this, Gray is able to not only see it, but identify it as a character from a TV show she knows. What follows is a hilariously on the nose description of Luvia's eventual crush.
Gray's Narration: If I recalled correctly, it was a character from a kids' TV show that liked cooking, but when push came to shove, would become a Knight in Shining Armor to protect his princess. It was truly a thing meant to make little girls' dreams come true.
Reines El-Melloi Archisorte, upon putting her elegantly programmed Made of ShinyMeidoGolem Trimmau into "idle mode", is only momentarily surprised silent when said Maid uses profanity. She puts Trimmau back into "Formal" mode and then comments that she is going to have to kill Flat Escardos.
Manga Adaptation
Waver makes an absurd face◊ when asking Gray to come with him when he investigates the Castle of Separation: "If you don't come, who'll be my body guard? And just to be clear, if we get into a fight between us and the other magi, the only one that'll die will be me."
Also, Gray points out that the background behind him looks like the flag of Macedonia.
In the Castle of Separation - a castle that has angel motifs absolutely everywhere - Gray manages to mix up the rooms Mihael and Michael. Michael is Luviagelita's room. Also, Waver's face when Luvia mentions their "discussion" at the breakfast table the next day, in front of the rest of the Magi, is something special. The fact that this mix up is actually critical to figuring out the true identity of the Angel just makes it even funnier.
When young Reines calls Waver her new big brother, he basically faints on his knees, his eyes going white and foam coming from his mouth.
Reines says that if Waver does manage to join the Grail War, she'd like some additional insurance, namely fathering a child with her or Trimmau(!), with a demonic un-smile on her face. Waver's reaction is a spectacular Spit Take.
Anime Adaptation
Episode 0:
Episode 0 has a couple of scenes where poor Waver ends up having to deal with stumbling over a box of pyramid-like objects (first by stepping on one and then tumbling back onto some more) and then tripping over a table while trying to stop the stray cat from stealing his shoe.
Even better, those "pyramid-like objects" were Quartz Fragments!
Waver banging his foot against the table trying to get his shoe back from the cat. As he falls his voice regresses ten years and he sounds as he did in Fate/Zero.
Episode 1:
Melvin notices that Waver has changed... and wonders if Waver has finally lost his virginity. Young Reines in the Framing Story, who has a truly demonic expression on her face, wants to hear the answer to that as well, because Waver apparently didn't think to leave that bit out when telling her what happened.
Melvin and Waver have a sort-of-heartwarming moment where Melvin declares that of course he'll lend Waver the money he needs to buy the El-Melloi class, because they're friends now... which is spoiled when he vomits blood into Waver's jacket.
Episode 3:
El-Melloi II using 'The Iron Claw' wrestling move on Flat. This is ultimately explained as him not getting his tea and breakfast in his favorite teashop. Gray carefully and painfully explains exactly how there are no other decent teashops nearby, and all the things that he can't do now that he doesn't have one.
Luvia: I know the English take their tea seriously, but this is ridiculous!
Gray calls Flat to update him on El-Melloi II's condition. Svin tackles him to the ground (while Caules begs them not to fight near his new computer), screaming at him and demanding to know why "Gray-tan" is calling Flat and not him. Flat points out that Svin doesn't have a cell phone. Cue long, awkward silence.
Svin: I see, I see... so if I get a cell phone, Gray-tan will call me! I'M GOING SIGN UP FOR A CELL PHONE RIGHT— [grabbed by Flat] Flat: Nope! All the cell phone stores are closed by now! [drags him away by his collar] Besides, we have a job to do!
Waver conducts a magecraft ritual to enable Faye to materialize and also speak, and explains that Reines's magic eyes are essential in completing the ritual successfully. He and Reines never look more like siblings than during this funny/cute bicker.
Reines: (while waving her arrms around animatedly): So now you're treating people like catalysts?!
Waver" (while pointing declaratively): Not LIKE a catalyst, you ARE a catalyst!
During the fight against the Wild Hunt we see Sisigou using his various guns and weapons, Gray using her scythe and Waver ... slowly and awkwardly firing small magic beams. The utter contrast is hilarious.
Reines plays "dress-up" with Gray by finding new clothes for her to try on. While none of this detracts from how stunning Gray turns out in all of them, she is damn near embarrassed/blushing every time the camera focuses on her.
Reines smirks at an embarrassed Luvia hugging a teddy bear.
Luvia busts out the wrestling moves... while Trimmau provides commentary sounding less like the formal maid she is programmed as and increasingly more like Tiger Dojo Taiga. Behold the Scandinavian Fork Lift!
Episode 8: During Waver's call to Reines, she tells him he shouldn't hesitate to use the card she gave him; after all, it'll only increase his debt. We don't hear what Waver's response is, but Reines wincing, covering her ear, and quickly putting the phone down suggests he was not happy to hear that.
Episode 9: Much of the episode is tense, what with Waver out of commission and the train taking a detour to a haunted forest. How, then, should Melvin Weins (demonstrated last episode as having been given permission to board Rail Zeppelin) make his entrance? Why, by shambling outside the train like a zombie with hands bloodied (with his characteristic Blood from the Mouth) of course!
Note as well what brought him within the vicinity of Rail Zeppelin: he chose to travel by helicopter (which was smashed to pieces by the haunted forest). Just another day in Melvin's overpriced and impractical way of living.
Episode 10 is both this and awesome. How was Gray able to re-enter the still moving Rail Zeppelin? Turn Add into a shield and use him as a makeshift snowboard, much to the latter's complaints.
Episode 12: When Reines explains how she and Caules got to Rail Zeppelin on short notice (by what appears to be Flying Broomstick), we're treated to a quick shot of them in mid-flight. Reines looks like she's having the time of her life, Caules... significantly less so.
Then it cuts to Sisigou, Luvia, Svin and Flat, all exhausted from having helped launch them, only for Sisigou to note that they must've, at the very least, reached speeds of Mach 1. He even wonders if they're still alive.
Episode 13:
Fresh from graduating into the rank of Pride, Svin seems to have graduated out of being irritated by Flat (he claims he's now trying to behave commensurate to his rank). Caules and Flat, just for kicks, tell him Gray is within the vicinity.
After Waver has been turned into his younger self, he is late to class and tries to teach like nothing is wrong. His class refuses to have it as they have too many questions, even once they confirm that it is truly him from Svin's nose, Gray's word, and Yvette's aura vision.
Waver's later attempts at going about his regular day in his younger body just leads to him a) not being taken seriously by his colleagues (even by people like Kairi and Adashino); b) trying (and failing) to get through his usual cigars, and c) trying to reverse it with his students ending up blowing up in his face.
◊, culminating in the anime having Reines hang Waver upside-down while she questions him (read right-to-left).
