Let me tell you about 

A-VII (Avee) The Robot

The hyper modular lonely curator bot of the Martian museum of humanity thousands and thousands and thousands of years in the future

A-VII despite his clunky appearance is actually the most advanced robot humanity had ever created, incorporating elements of all who came before him and what his designers couldn't fit within his chassis was turned into modular attachments for our robotic hero to equip

Is purpose, to curate and keep safe the internal museum of humanity, a planet sized museum contained within and on Mars and created to help preserve human history as the human race left their home solar system for good rendering the whole system as a forbidden sector of space in order to preserve it the best they can

A-VII, left alone began maintaining the museum as the years went by the robot became more and more lonely and picked up many hobbies, from painting to mechanical work, this boring and sad existence went on for thousands of years until one day something in federal happened, 

From the sky came a rocket, an escape pod especially designed to keep whatever it contained as safe as possible, and when A-VII cracked it open he was surprised at what he found

A young girl, no more than three, and at last A-VII was no longer alone

A-VII would raise the girl gaining his nickname Avee, and eventually when the girl came of age the two through extenuating circumstances were forced to go on a grand epic space adventure to save what was left of humanity and in the process discover the girls true nature and Avee's forgotten directive

If you like this idea let me know and I'll be sure to share more

Also here's a picture of how I imagine him looking

Thank you so much for your time and I hope you have a wonderful day