The defender left Real Madrid this summer after the expiration of his deal at the Bernabeu and has committed to the Swans for the next three years.
The player is Ecuadorian by birth but also qualifies for Spain. He is expected to join the club’s Under-23 side but is hoping to break into the Swans’ first team at the soonest.
“I think it’s a great opportunity for me,” he said. “It’s a club with a lot of history.
“I’m looking forward to getting started as soon as possible.”