I keep seeing these fairly consistent depictions of non-chaldea post-finale Fujimarus and Mash; were these designs featured in the game somewhere? (Doesn't play JP and is struggling to find evidence in Atlas Academy)

Ylimegirl said in comment #2579375:

I keep seeing these fairly consistent depictions of non-chaldea post-finale Fujimarus and Mash; were these designs featured in the game somewhere? (Doesn't play JP and is struggling to find evidence in Atlas Academy)

They're from an animated cutscene that plays after the part 2 credits. Here's one of the few places I know of to watch it currently (post-credits scene starts at 4:05).