Semi

Semi is a Moon Person.

He has a soft personality; he is very friendly, behaves in an upbeat manner, and worries about the well-being of others a lot. Unlike most Moon People, who have been shown treating Gems in an objectified manner, Semi shows Phos kindness and concern. He is somewhat unintelligent and clumsy though, making slips of the tongue and not being able to explain how things work.


He had become acquainted with Phos while they are on the Moon and accompanies them both when they return and when they come back with the other Gems.

When he first met Phosphophyllite, he was unable to remember and speak their name. He later accidentally reveals Prince Aechmea's name to Phos, causing him to immediately cover his own mouth in surprise.
(Source: Houseki no Kuni Wiki)