I'm Tyler, nice to meet you too. Let's get the complicated stuff out of the way.
Obviously you know Kyoko. There is also: Triesta Darkholme-Harkness- Pops' daughter with a woman named Raven who is fucking gorgeous Rhiannon Harkness- She would be your half-sister. She's Pops' daughter with Gwen. Gallifrey Tyler- technically my twin sister, but her father is Doctor Pops with my mum. Though Pops, Doctor Pops and Mum just figure Gallifrey and I are all their kids. Rain Harper- Owen's daughter with Lyssa Kit Harper- Owen's daughter with Diane Molly Harper- She's um... Owen's daughter with Ianto. So another half-sister. Coop- obviously