Encyclopedic robot:
~ created by the smartest being in one of the galaxies.  After the death of the creator, continues the work of his life:
• looking for lost / dead / on the verge of extinction civilizations,
• encyclopedia of knowledge that has been salvaged
~ sentimental. He wears his deceased father's coat and glasses in memory of him.
~ solar-powered

AI - Artificial Intelligence (Sphere 🌚) - the Robot's Companion
~ has unique capabilities to collect, analyze and store a huge amount of information
~ devoted to his work and the Robot, as well as their common creator
~ inside an endless source of energy

Both Robot and AI were written at different times by the hand of their creator with all sorts of formulas and various notes.  Some eccentricity of their father.