Hidden Details: A Valentian Effort

Welcome to the one-hundredth-and-thirty-sixth episode of the Hidden Details blog!

Have you found some obscure reference or detail in this comic? A JoJo reference? A sneaky little Loss? A callback to a previous comic? Let us know what you've found in the comments! Every detail that has been found will be added to the list below. Once everything has been found, this comic will officially be marked with "all details found".

Link to the comic for your convenience

Please only comment with ONE hidden detail or reference!

There is ONE Loss, ONE Balthazar, ONE crewmate and NO JoJo reference. Bonus panels don't count.

1: Well yes, the thief and the room in the first panel are taken directly from Fire Emblem: Shadow Dragon. I had to work with very low-resolution DS sprites to recreate it, but I think it worked out quite well, Conner Kavanaugh!
2: This week's loss is visible in the tiles in the background of the first panel, as pointed out by Nick Agee.
3: There's a little Pegasus Knight flying by in the background of the first panel. I don't remember much from Shadow Dragon, only that there were a lot of Pegasus Knights in that game, Zanreo.
4: The sign in the second panel says Byleth ♀, possibly alluding to a male Byleth existing somewhere as well. No idea actually Jon Brouse, I think I want to choose a "canon" gender for all the multi-gendered fighters in this comic series. Pokémon Trainer is female, for instance.
5: The sign attached to Roy's bed says "Roy (FE)", since there's also another Roy in Smash (the Koopaling), as mentioned by VisionPlayer22.
6: Isabelle is reading from a book called "FRAMBLAM, A Comprehensive History". FRAMBLAM means Fire Emblem of course. Not sure if I would trust a book that doesn't even know how to spell its main topic, Generic Hero.
7: Incineroar isn't able to tell the difference between Alm and Celica and the other Fire Emblem fighters and to be honest, with the amount of Fire Emblem fighters in Smash, I can't blame him Noah.
8: The Aum Staff brought by Alm and Celica has a little bow on it. So thoughtful, Tejayes!
9: Balthazar is watching the fighters from behind the fence in the yard in the third panel. Good eyes, Dave Papworth.
10: Celica mentions they heard fables about the Aum Staff in the east. This is lore-accurate: Fire Emblem Echoes takes place on a continent west of Archanea, the continent on which Shadow Dragon takes place and the Aum Staff is found. So yeah, it's not because of the religious symbol, Trigger ;)
11: Much of the Aum Staff text is taken directly from the Fire Emblem wiki. It's also visible in Isabelle's book in the panels where she's reading from it. And yes, it is also the exact same as the text Isabelle is speaking, Zach.
12: You know what else is visible in Isabelle's book in the fourth panel? A very little crewmate with the word "sus" above it. Good catch, Cameron Devera.
13: The sign in the Fire Emblem fighter room has "Anime Swordfighters" crossed out and replaced with "Fire Emblem nerds". Seems there was a bit of disagreement on what to put on this particular sign, edmg7.
14: CORRIN FEET, Tim Lockwood. This is a reference to the infamous copypasta which I won't post here for our own sanity. But yeah, it also gives me some extra time to decide which Corrin I'm going to use.
15: Yes, Fighting Master! I didn't think anyone was going to spot this but I based the effect of the breaking staff on Breath of the Wild's weapon breaking animation.
16: It's hard to spot, but Chrom is lying behind Incineroar in the final four panels.
17: Alm and Celica are confused by the concept of weapon durability. This is because Fire Emblem Echoes: Shadows of Valentia is one of the few Fire Emblem games in which weapon durability isn't a thing. So it makes sense for them to not be aware of this mechanic, GabaLeth!

The details that haven't been found are written in italic.