The Doctor: 11th version (Matt Smith); TimelordRiver Song/Melody Pond: 3rd version (Alex Kingston);Human plus TimeLord
Ava Song/The Lost Girl: 1st version: Slightly Curly light brown hair and sapphire eyes/ usually wears black jeans and a dark coloured tank top/ normal children clothes for child version( use your own mind lol); Timelord Hybrid
D2: "broken" regeneration cycle/endless loop: Slightly curly dark brown hair and emerald green eyes/ dark jeans of any colour and dark t-shirts or casual suits/ overalls and light blue shirts for child version; ???/TimeLord Hybrid
Koldaine: no regenerations: Blonde straight hair and blue eyes/T-shirts and jeans/ normal children clothes for child version; Human Hybrid