Motherfuckers talking about LIs like they are a pokémon team in a battle.
The seven Goddesses and Calypso are the perfect number because they are the perfect girls, stop dropping them you bunch of blasphemous.
View attachment 3211141
Jokes aside, I think Caribdis knows that 7 is a high number, but manageable, that's why Calypso is not an official LI, because this means more time for Calypso and with the others 7 will be really difficult to do, but until now he makes an amazing job to make every girl shine and had her moment, even Annie.
(yeah, the useless meme is even in the game, but you can see in this post how many images of her we have like reactions, because she being useless is, jokes aside, part of her shining moments. And being honest, she is not useless, she presents Eternum to Orion, she is the key piece to steal the gem of doom, etc.)
Every one of the girls are important for the story and for Orion, and maybe in others VN the girls are disposable, but not here. That's why the harem works in Eternum, first because they are not just girls, they are THE girls, and even if you drops the romantic path with one of them they doesn't disappear from the story, because they are needed and important, and second because Orion is not a passive MC, is an active one, he really loves the girls, makes time to them and tries to be her friend first, and her lover later. He listen to Calypso talking about her past because he's interested in her as person, not as a sexy elf booty mommy. He holds hands with Luna because he is worried about her, and even with Nova, being she the most crazy girl in the game takes time to understand her and tell her "yo bitch, stop spying me, just talk to me you redhead gremlin" because he cares about her, first and foremost. So making the LIs in the game fewer will be worse for the game, just like making a car with 3 wheels or a plane with 1 wing, could work but is not the ideal. 7+1 girls is perfect.