Thread:Mira Laime/@comment-27725096-20180618232214/@comment-26339491-20180619165941

It's possible that the account owner gave away his password or stayed logged in on a public computer where someone else could then use his account. It's very unlikely that someone outright hacked the account.

Where there is a strong suspicion that this could be the case, and where it poses a problem (e.g. a trusted admin suddenly starting to vandalize) FANDOM can check the IP addresses that the account edited from. It doesn't sound like anything too drastic is happening with the account (it's not being used to cause trouble)?

I'd give it a bit more time to see if your friend goes back to his normal behavior or responds to you. Even if the account was taken over by someone else, its owner only needs to change the password to take control of it again!