It’s not platonic. It’s romantic. Clearly you haven’t read all the books. In the 10th book “the Prince lestat.” the two kiss and Louis confesses his love to lestat ( which lestat done in almost every novel he accrued in ). Not to mention Anne rice has stated they are a romantic couple and even write out ow there…

Honey, they’re vampires. None of them have a sexuality. However, lestat and Louis are involved romantically. This is a fact stayed by Anne rice. Not to mention I’m the last book titled “the Prince lestat.” The two kiss.