Things that happen in [Fool’s Gold] out of context:
Julius learns that his boss is illiterate and that’s why he’s been stuck doing all the paperwork.
Cecilus shows up on their doorstep randomly one day while Reinhard is out, and Heinkelbaru sends him to go play with Reinhard while he makes dinner. Cecilus takes this as an order to attack Reinhard randomly in the street before leading him on a massive three-hour battle through the countryside. It almost causes an international incident.
Sometime after Wilhelm finally figures out the truth about Heinkelbaru, Subaru manages to wrestle him into agreeing that he owes him a big favor, just like he does with Roswaal in Arc 2 — and then immediately calls in that favor by handing this man a bunch of flash cards he wrote for him in order to help him reconnect with his son.
They aren’t even alone when he does this. Several people just watched this guy possessing Heinkel’s body press a bunch of flashcards into Wilhelm’s hands with things like “Encouragement and praise is more important than criticism” and “Talk about the less murder-y parts of your day over tea” and “Say the words ‘I love you, son’ at least once” written on the backs.
Heinkelbaru keeps coming across was waaay fruitier than people remember. This raises a lot of questions.
Having no idea what he actually looks like, several people suspect that Subaru is actually a woman.
TonChinKan now have a father figure ordering them around whether they want it or not. They do not.
Grimm and Carol are among the first to realize that Heinkel’s been possessed, and it turns out they really don’t like the idea of something happening to the man they helped raise from infancy.
Crusch’s [Divine Protection of Wind-Reading] lands her in one of the most ridiculous situations imaginable post-Whale.
Subaru thinks Priscilla is, like, twelve. He looks at Aldebaran (clearly his age) with such an insanely disgusted expression that the two of them almost end up dueling over this.
“WHAT DO YOU MEAN SHE LOOKS LIKE A CHILD???”
The entire Royal Selection Ceremony is an absolute disaster.
Heinkelbaru casually mentions that he’s been stargazing all the time lately without realizing the connotations of that word in this new world.
Heinkelbaru brags about his sewing ability. Nobody remembers Heinkel knowing how to sew, but clearly he can.
Heinkelbaru has no idea how to use a sword. He is trying very hard to not let anyone know about this.