The wife of the Saint (Thomas)
was going to sacrifice herself to stop a very destructive Syrneth machine from destroying the country of Vodacce and part of Castille.
She used her fate-influencing magic to prevent the Saint from stopping her (much to his frustration).
But she didn't notice Alejandro, who heroically took her place in the machine and gave his life to stop the destruction
and save the wife of his friend.
Alejandro's body was obliterated.
So he's assumed to be dead. Of course, with Syrneth technology, one never knows... (to be continued?)