During a combat against a Lamia a companion get charmed, I won the combat, failed uncharm the companion, flee the combat.

I came back the companion (removed from party) was still charmed.

Some failed attempts:
- Wait the charm ends itself failed, used 1H Rest close by the companion, the charm never ended.
- Take down the companion with non lethal damages. Healing him back just get an aggressive NPC no way to talk with him to get him back in party.
- Leave and rest to memorize more spells like dispel magic and suggestion failed, when I come back the companion has disappeared, and it's not a companion coming back at a precise place.

Try a 8Hrest close to companion will probably fail with enemies spawn interrupting it.

So, non co8 version, any way to fix it?

EDIT:
Kill him and try use a resurrect scroll fails, the user has 14 in Use Magic Device skill but the attempt always fail, I suppose you can't use it on an "enemy".

EDIT:
Woo achieved do a rest close by, and suggestion worked, companion back in party because charmed, but travel and during travel he leaves party so back to aggressive and leaving during travel, I suppose. Dialog is working fine but it changes nothing. After the rest I think the Lamia charm ended but he remains aggressive if I move close, I suppose it means a dead end. Perhaps a console command can fix it but not sure what word search.

I almost solved the problem but that was rather complex:
- To have more suggestion spells memorized I did a rest close to the companion. It's more or less miraculous it worked without interruption.
- Charm had ended, could make a suggestion that worked and charmed the companion.
- When companion charmed I moved him to enemies (Hill giants) get him killed.
- then he lost the charm stated but still in party. At this point it's certainly like usual death.
- In this case used Reincarnation in a wild area, it worked, now as I don't buy the rule of xp lost lost on death revived I'll use a console command to give XP back.

Still this companions is screwed up despite fine in party, The whole start village enter in combat when he is in party, it's like the Lamia changed his side forever, a bug certainly.

I'll have to redo the combat but probably not with any follower which means move them far enough to not have them involved.

Redo the combat was a lot faster and simpler than try solve the problem lol.

The good point is it seems the misadventure made me discover a place safer to rest in Temple, finally.