MeidoDev I want to help you, this will help me to focus on doing something rather than scattering my attention all over the place. Looks like a fun and reasonably feasible project. I'm assuming we're ok with wheels, and you want her/it to look like Senko San.
- talk, and I assume process what is said to it as well, understand basic commands, doesn't need to be intelligent, but "just work"
- follows you, so it needs to have a way to distinguish you from say, another person, dog or roombah. Cheap method: gps tracker fob you carry. More difficult: Facial / sillhouette recognition
- Ambulatory but wheels or treads are acceptable, seems simple, you mentioned balance was an issue, how about angled wheels and gyroscopic stabilization?
- Snu Snu: well enough said, if you're going to get intimate with this Meidobot then it depends what level of interaction you want and how tall does she need to be? I mean I'm assuming you want more than a fleshlight on wheels.
I'm downloading Fusion 360 and I'm going to teach myself how to use it. Initially though I can provide pencil/paper sketches, I have large sheets of graph paper for this so it will be a notch above just scribbles on notebook paper hopefully. I'll update you with progress ITT.