Comment by curio_Pol_curio

supplementing your points: Japanese seem to prefer dropping the honorifics when in English:

https://archive.ph/OI3S2

I've also heard that it's still common to address one's peers with -kun in parliament.

In GP's case it sounds rather quaint, but also endearing (like referring to a neighbor or a long lost schoolmate in the third person)

Pedantry: Takaichi is her father's surname. (I had to look that up, tbh)