@Ichicora:
Oh, definitely. It seems like it would be incredibly charming.
Not necessarily for a super-long series (as seems to be described here), but a solid two or three volumes of super-robot/fantasy-princess bravery and camaraderie
and maybe some romantic tension? Staying as BFFs would be fine, too... it could be quite refreshing, especially with the
ye olde wide-eyed shounen thematics, as depicted here.
I presume the artist doesn't have that kind of spare time and energy—thus this shorthand version with the speculative world-building sandwiched between the art.