The second child the Doctor welcomed was another baby girl three years later. Adelina had fallen in love with her baby sister at first sight, but she would soon realize that the two couldn't be more different. From the time she was born, the air around the Doctor changed from the lulling feeling Adelina had brought to a cold shiver.
She was two when the Doctor first caught his little troublemaker. The fiery red-head was chasing her sister around the yard the day after a horrid downpour. When the pair fell into the mud, Adelina was checking for tears in her little sister's green eyes while Keira took the distraction to take a pile of mud in her hands. She smacked it against the top of her sister's blonde hair, laughing as the little girl screamed running to her father watching from the doorway.
She had earned herself a stern talking to, but then again she had also earned herself a reputation. The only saving grace was when she was about five she had a serious dedication to playing copycat with her sister. After that, she only got worse.
But despite her outrageous behavior that the Doctor liked to deny sometimes, she had developed her father's curiosity. Specifically dedicated to one subject, colors. She was absolutely in love with colors, the colors of things, things that change color, the whole works.
When she reached her teenage years, she started to change her hair color. It started off with red, when one day the Doctor was painting the mantlepiece and the girls were trying their best to help out. Thankfully he had put out a very large tarp and dressed them in very old clothes that barely fit, because Keira seemed to be painting her hair instead of the wall. Despite her sister's advice that her hair was already red, Keira loved the darker shade that the paint was.
Next came blonde, a little bit darker than her sister's though, then came brown, then black. The Doctor was running out of acceptable colors to die her hair when she had decided that she wanted to be blonde again. There was a whole day, after dying it the second time, that Keira sat smiling back at herself in the mirror. It was one of the Doctor's favorite memories of his second daughter.
But unfortunately with that phase through, she quickly made it her ordeal to drive her father insane. Years of short skirts, unannounced hair cuts, even a pierced nostril, later the young troublemaker had been captivated with her nephew Lincoln. Her sister smiled happily, telling her father that she had always had been better at keeping the girl in control.
The troublemaker quickly found that instinct in every woman, the desire to have a family, and she tried desperately among the fellow Gallifreyan boy to convince them she wasn't going to set their house on fire after they let her in. He had once caught the blonde searching through her older sister's closet, which he confronted immediately.
Just before he was sure she was about to give up, there was a traveler that came to town with his son. The Doctor knew the man well, and he decided to have his old friend over one night. The traveler's son became captivated with the second daughter and soon the Doctor's little girl was off hopping from planet to planet.
After welcoming their sixth child, his daughter came back to him telling him of everything she'd seen. She told stories of the neighboring worlds, worlds that the Doctor had never bothered visiting in his travels, when he got the chance to meet his second grandchild. It was a little girl which she called Nemesis, why the Doctor didn't know but he assumed it might be because of her little rebellious stage.
Despite her newfound motherhood, she still didn't seem that interested in her first family. Nemesis was the quiet and shy type so his granddaughter didn't come over as much as a child as Lincoln did. But then again, he only wished to see her more often.
A while later, Nemesis was joined by a little brother by the name of Abraxas. Abraxas was much interested in his mother's younger years, so he spent many of his toddler days sitting across from his grandfather learning of the troubles Keira put Adelina through.
Abraxas became just like his mother, not that the Doctor expected any less, while Nemesis still remained very quiet and shy. The pair joined their parents in the love of traveling, and the Doctor only hoped that the world would bring them home.