The Doctor's TARDIS (Blood Heat)

The Doctor's TARDIS was a TARDIS from an alternate timeline generated by Mortimus. It was originally the third incarnation of the Doctor from that universes' TARDIS. That incarnation died, killed by the Silurian and his regeneration prevented by Mortimus.

The TARDIS closed down and died along with him. Ace retrieved the TARDIS key from his body which had become isomorphicly neutral, meaning anyone telepathically authorised could bond with it and activate and gain access to the TARDIS.

When dormant the interior dimensions were only enough to contain the console, when Ace activated it, by placing the TARDIS key in a slot in the console it connected with her mind and created the interior dimensions. (NA: Blood Heat)

Exterior
With a working chameleon circuit the TARDIS was able to blend in with its environment. Becoming an Aztec idol in Mexico in 1487. When it arrived on the Titanic it became a large featureless crate. (NA: The Left-Handed Hummingbird) Ace plotted an exterior of the TARDIS using the keyboard inside the console; a 25th century Axmeister tank, however the Doctor, upon discovering this reset it back to the TARDIS' control. Upon which it disguised itself as a gingerbread cottage. (NA: Conundrum) In London the Doctor materialised the TARDIS around and then disguised the TARDIS as Nelson's Column, however the disguise failed due to Mortimus' interferences replacing parts of the column with the Statue of Liberty. (NA: No Future)

Finally it appeared as a tarot reader's tent, and then the Doctor decided to permanently "fix" it to appear as a police telephone box from 1963. (NA: No Future)

Interior
Taken from Ace's mind when she first activated the TARDIS there were laboratories, living quarters, a swimming pool, cloisters, libraries within the TARDIS' interior dimensions. Ace also created a new room for herself. (NA: Blood Heat).

The console room contained a Edwardian chaise longue, and within one of the roundels a thermos of coffee. (NA: Blood Heat) There was also a basket chair and a hat stand in the console room. (NA: The Dimension Riders)

Systems
The console had an emergency dematerialisation switch. This TARDIS was, initially able to alert Ace and grab her attention to certain matters. (NA: Blood Heat)

The TARDIS had a working chameleon circuit (NA: No Future), until the Seventh Doctor permanently disabled it. (NA:

The TARDIS's state of temporal grace also functioned correctly, able to halt the missiles fired by the HMS Revenge at the Silurian's palace. (NA: Blood Heat)

It contained a Jade Pagoda an escape pod for the TARDIS which contained basic flight systems. (NA: Sanctuary)

Personality
Initially the TARDIS does not trust the Seventh Doctor. It could give warnings, including sounding the cloister bell telepathically to those it did trust; Ace. (NA: The Dimension Riders) The TARDIS often became "sulky" when the Doctor was piloting it. (NA: The Left-Handed Hummingbird) While there was no day or night inside the TARDIS it did dim the lights when it felt it was night. (NA: The Left-Handed Hummingbird)