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Hmm, maybe it's because of a specific dialogue needed to trigger to unlock it, there are 8 triggers to unlock Ricard's bio:

- Unlock 1:  (In Ricard's route) "He stabs into both of my eyes and slices down my face." || "The last thing I saw was his cold gaze before he stabbed me in the throat." 

- Unlock 2:   (In Ricard's route) Ricard: "Fuck me, hahaha!! FUCK ME!!" || "He rips my entire face apart."

- Unlock 3:   (In Ricard's route) Ricard: "It's a bad habit of mine." || Ricard: "I need to remember that you're [MC] now~" ||MC:  "What?" || Ricard: "Anyways, what's your choice?"

-  Unlock 4:   (In Ricard's route) "His other foot steps right in my mouth, going straight to the back of my throat, he then turns the heel to the right and slices my face off."  || "I can’t do anything anymore, my body is useless now" || "I close my eye and fall into darkness."

- Unlock 5:   (In All three route) Ricard: "Hurry up and get a move on. I have other work to attend to." ||  Shiba: "Yes boss!"

- Unlock 6:   (In All three route) Lev :"It's not my fault that Aster-" ||  "Didn’t even let his brother finish his sentence, Ricard gives him a straight up punch to the face" ||  Ricard: "You bitches touched my stuff?!"

- Unlock 7:  (In All three route) Lev: "Look, he’s going to find out either way, there’s no reason to lie..." || Ricard "Hahaha, well, thank you for being truthful!"

- Unlock 8: (In All three route) "My body suddenly gets super cold and I wake up." ||Blond mask guy: "Ah, good morning~"

Ricard's bio should be unlocked once you've read all these in-game