This fic was meant to be short but whoops. Ian, Barbara, One, and Susan being all family like.
His face suddenly clouded over. “Susan? Who told you about Susan?”
"Barbara did." Vicki suddenly felt as if she’d been thrown on the defensive. "She said that Susan was your granddaughter, and she left the TARDIS to get married."
The Doctor stood. “Yes, Susan was my granddaughter, if such terms can be applied to beings like us. I loved Susan. I loved her very much. And now that she has gone, I miss her more than you will ever know. I feel that I am…”
"Alone?" Vicki suggested gently.
The Doctor nodded. “Alone,” he confirmed. “When I left, she came with me. She could have stayed, but she felt that I needed looking after.” The Doctor’s face was suddenly haggard. “Although she was sweet, and guileless, and innocent, she was the closest thing to a conversational partner of my own level. There were things that we could talk about that would be meaningless babble to…” he shot Vicki a guilty glance. “…to anybody else. She was the one person who understood.”
"Understood what?" Vicki whispered.
"Who I am," the Doctor said, not meeting her gaze. "Why I left. Where I was going. And now…"
-Vicki asks about Susan (The Empire of Glass)
Fluffy fic for cheering up purposes. The Doctor takes Susan, Vicki, and Dodo to an alien museum.