Can I activate my sisters old accounts?

Hi! So my sister had these two accounts @Auriel and @Atka. She had to stop role-playing due to having quite a few surgeries in the span of like a year and now she has no interest in picking it back up and is happy to let me have them? Was just wondering if there's a process of changing ownership or if I just start posting as them?

Since you already have access to the accounts, ownership is implied, so I think you're good to go. If you want to reset the post counts, make sure to request it in Maintenance.