Why not play it in a more Lycanthrope way...? - towards a more human/evolved version of this species...? Then in this form, all this merge very well with the general atmosphere of your game-Novel. (especially since a lot of very diverse affinity bonds could very well develop between all the characters that you have created) - there is already a very beautiful feeling that you have already created between them all, and it is becoming more and more interesting/intriguing and mysterious. (with a rather unique mythical side that spices up the curiosity of your audience)
Especially since you have already installed a little romanticism, sensuality and passion in the personality of the main character, you could possibly slightly accentuate all this towards certain characters, such as the detective for example, who seems to be being charmed and tenderly attracted to him. - for just one example, like an impossible love relationship ...?
And develop a rather special and wild (passionate/carnal) attraction of the main character to its creator. (these are just simple examples)
On the other hand, this young vampire who follows the main character everywhere, he sweats sensuality and a very protective and loyal side to his human heart. (especially since obviously he seems to have had a romantic relationship with the detective ...) - that on the other hand, it would be interesting (and funny) to see a werewolf with a vampire ... LOL
Regarding Dr. Ricci, it's hard to place him in this story other than the somewhat fatherly figure and best friend ... - but at the same time also with very deep feelings towards the main character ...