FACET

Background
Simply put, FACET is Haru's ship. To the many races of the Runiverse and the Whoniverse, it is unknown exactly how such a unique timecraft was obtained. Haru's mark has definitely been left on it, as technology from races such as Daleks and Charon, along with other races with the ability to time-travel has been incorporated into the design, hence it's eerie likeness to a void ship.

The least accepted theory, which happens to hold the most truth,is that Haru obtained it during the Last Great Time War.

The reason this is usually not accepted, however, is due to the question "Why him? He's not a Time Lord."

Or is he? Haru can certainly pilot it like a Time Lord...

Design
Admittedly, the inner workings are insanely complicated. however, at most times, it remains a large, featureless, 7-foot tall jet-black egg lying on its side. In flight or activation, its a whole nother pot of lobster. in fact, when activated, large blue swirling patterns, like gusts of wind, appear on the side, along with other designs. Haru, in one of the few answers on this matter that actually answers something, has personally said he has no idea why it does this.