契媽

契 = 㓞 + 大 : Mnemonic symbol: a written deed.

The robot (大) and the Queen of Hearts (qi) reached an agreement in the space station's bathroom (Ø4). Lacking a proper pen they sign their written deed (契) with an engraver (㓞).

妈 = 女 + 马 : The unicorn told his kids Bessy Coleman and Mahatma Gandhi that he will finally reveal to them who their real mother is. In front of the ashram, they meet their mom for a first time, and realize that she is a centaur.