After erasing his Fatui ties from Irminsul, the Wanderer is shown to be amiable and yet living an unsatisfactory life as he lacked a human heart and name. 

The lack of a human heart caused him to long for a purpose and thus willingly accepted his memories back, to reclaim his sins, to be himself once more.

Following the restoration of his memories, the Wanderer still retained all of his traits as Scaramouche, simply stating what he sees in front of him — snarky and arrogant.