A cute weeaboo bean with pink hair.

From STEM, an abbreviation short for "Science, Technology, Engineering and Mathematics", a STEMlord is a pejorative term for a particular kind of person who has studied in these areas at university or works in these fields who holds a pretentious, condescending attitude to anyone who has studied in any other fields, particularly the Arts and Humanities. They typically believe themselves to be more "intelligent" and "rational", while generally remaining incredibly ignorant outside of their areas of expertise and having the charisma of a rotting pig's backside.

The god of amongst all anime traps.
Astolfo is a male anime character made to look as though they are a female.

THE BEST WAIFU. Any other waifu is irrelevant to Astolfo, even Zero Two.