Yeah @caringang there are a few angles you could approach this from.
I’d say Duke Agares to bring someone back. A petition to him may be effective, perhaps Orias or Dantalion to persuade them to return to the conversation.
Maybe a reconciliation spirit like botis, or Orobas.
If this was live related maybe I’d go with Furfur or zepar.
Kind of up to you really.