This is Milla. :) Milla is a new OC of mine. She's a type of transforming android made to be able to change into a rideable form. I'm still designing her control mechanisms, but I've ironed out some of her details. She has a few more... mature features, which I won't be mentioning here, so if you want to know about those, note me and I'll tell you. Anyway, here's what I have so far:

Milla is the first prototype in a line of rideable androids. Milla is fully waterproof, and can support up to 500 lbs of weight. Milla is equipped with a highly advanced AI that not only allows her to learn, but also enables her to think and act for herself. The only exception to this is that she must follow any command given by her registered owner (as long as that command does not involve intentionally harming a human). She is also fully capable of feeling of emotions. Milla was designed not only to be rideable, but also to be an ideal companion. Thanks to the use of hybrid vehicle technology, she is able to run on both gasoline and battery power while in her riding form. While in her riding form, her visor not only acts as a windscreen for her eyes, but also relays battery and fuel levels, engine temperature, and speed. Also, warning alerts for malfunctions, low fuel, low battery, low tire pressure, etc, will also appear.
Her main power source is her battery. Milla requires 6 hours to fully charge her battery, and can function for up to 18 hours per charge. However, certain activities, as well as the use of her riding mode deplete her battery more quickly. In the event of her battery becoming depleted, Milla has a 5 minute emergency backup power supply. If completely out of power, Milla will enter emergency shut down mode to prevent the loss of any data.
Milla only uses gasoline while in riding mode, and in the event that she runs out of gas, she can continue to run, at a reduced speed, by switching to battery power. If out of gas, Milla will ask if her rider wants to switch to battery power. Although while running only on battery power Milla can continue running until her battery reaches critical level (5% power remaining), it is best to rely on battery power while riding as little as possible since the use of riding mode on battery power alone drains her battery three times faster than normal.

This is really all I have thought out for her so far. I'm still choosing what colors to use for her and such. For those wondering, I based her speed and fuel readouts off of those of a Toyota Prius. :) I reduced the number of pips (I think that's what people call them) on the fuel gauge since she has a much smaller fuel tank than a car. She's only in the prototype stage, so I may change some details later on.