The Stoopid Unikorn
Spiciest of Guacamoles
There's precedent to a series getting an entire logo change, at the very leastAlso even though the series icon is technically supposed to be Falchion, Ike still has an important sword in Ragnell, so it can technically still work for him since the FE symbol is something as basic as a sword lol
And for Dragon Quest, the others don't have different series icons because they're alts.
I just think it'd be weird for a character like Aigis to have the Phantom Thief insignia as her series icon even if Joker does come back with her lol
So Persona getting a more encompassing logo rather than the Phantom Thieves logo is not out of the realm of possibility