Side point to this since it doesn't involve shards, Fray and Myste are also not separate consciousness sitting around, they were both just temporary manifestations of the utter broken madness he'd fallen into during that time and went away when he clawed his way back to sanity
I don't do the 'WoL has a couch full of people in his head' thing a lot of people do; Ardbert does not exist separately anymore, Aster ceased to be Aster when he died and was rejoined, they were fragments of Helios and when rejoined simply returned to being part of that soul. Their memories remain,