>>89306551Alts are effectively different unless the person produces the same content with both vtubers. Jelly and Moon Jelly are not the same, she uses MJ to release music under her own IP so that she owns it, but otherwise does everything else as Jelly. Likewise, Menace basically exists and is kept around at this point for Coni to do lewd ASMR with that she can't (won't?) do as Coni, so they should be treated separately.
Any instance where a vtuber still uses their PL, ask yourself if they're doing the same content with it as they are with their current name. If they're not, they should be treated separately in conversation.