Seren Thomas has been added to City Women's squad to bolster the side's defensive options.
The Wales youth international arrives from Penybont and primarily operates as a centre-back.
Thomas has represented her country most recently at U17 level, recently featuring in fixtures against Denmark and Portugal.
Seren has signed an amateur contract with the Bluebirds.
Commenting on her move to City, Seren said: "I'm really happy to join the Club. I feel like it's a great move for me and I'm excited to be here.
"It's a Club that brings through young players and from the outside, that always looks really good. That's one of the things that drew me to Cardiff City was the way that they support young players like myself.
"I'm excited to play in the Adran Premier. It's a great league to be involved in and I'm looking forward to being a part of it."
Welcome to the Club, Seren!