To see the world

Although the Harmony was imprisoned below the Gallifreyan Capitol, she enjoyed freedom hardly anyone had. Her countless Eyes, the centre of every Tardis, had seen much. All corners of Gallifrey (too many times - she should send those Time Lords' Tardises off-world), the whole of multiverse, the birth and death of time, and much more.
She was the queen the Time Lords never knew they had. And she wanted to see more.
***
The Doctor's Tardis shook. He held onto his umbrella, but Ace fell down.
"Oi, professor!"
Ace checked her bag for explosives they would surely need wherever they landed next.