diego? dora's friend? XD
hmm..our Alehandro looks not influenced even a bit by his father's death though, i might assume he's glad too...
also, the worst possibility is he know something...
like.. the father might be not actually dead yet? as long as the corpse is not recognized as the duke, it's always possible in this kind of novel...at least imo.
but he better off dead though...
now all left is the mother...