#by the way the reason Foul Legacy doesn't know any phrases of endearment is because the Abyss was MEAN TO HIM

[that-foul-legacy-lover]

Extremely odd idea but like

reader who like keeps calm most of the time and yk doesn’t really raise their voice much

but they unintentionally switch to latin when theyre like super pissed off

and the first time in happens with human childe… he wasn’t expecting it ofc. got surprised, then got used to it

but i’d like to imagine FL and Childe whilst share important memories, dont like know EVERYTHING the other does and they do have like similar thinking processes and personalities but some differences that makes them a little different from one another(its ok we love them both)

Foul legacy when he first saw this happen though was after the events of the 4.0 archon quest. When he woke up(lets pretend he woke up as FL transformed bcs his body thought he was in danger when he got knocked out mid transformation) he heard yelling. particularly the reader yelling. more elaborately the reader yelling in latin of all languages.

The guards who only know english and frencb are dumbfounded and reader is so pissed off theyre rampaging with their words in latin, not capable of even thinking to language switch back from hor fucking furious they are that the guards hurt and locked up their precious moth

wait this is perfect actually since Khaenri'ahn languange is (i'm pretty sure) based on Latin, and Khaenri'ah has connections to the Abyss!!

normally the prison guards would be stricter with who was allowed into which cell- but you're stubborn and absolutely furious with them, shouting words they don't understand, looking like you're about to straight up maim one of them. Foul Legacy watches in awe as you berate the guards in Latin, catching a few words here and there, words that he's seen carved in stone and on walls deep beneath a lightless sea. finally the guards relent, possibly out of fear, and let you into the cell

immediately your angry demeanor falls away as you rush over, wrapping your arms around Legacy as he chitters in relief, nuzzling his head into the crook of your neck. you whisper soothingly to him- a stark contrast from your yelling a few minutes ago- as you caress his plated cheek with a hand. your words are still peppered with Latin, phrases that are completely new to Foul Legacy, but he knows they must be good from how sweetly you say them. there's one you say often- "amica mea"- and you murmur it with a shine in your eye as you place a kiss on his forehead, Legacy's claws wrapped around your hands like they're made of glass. the guards simply watch, dumbfounded and astonished upon seeing the Abyssal creature that was just viciously growling at them melt in the hands of a mere mortal

later Ajax asks you what "amica mea" means, a vague memory tugging at his mind, and with warm cheeks you tell him that it means "my love"