Acolyte, in French just like in English, describes a devoted follower, assistant, or sidekick who stays loyally by someone's side. It's a word less common in everyday speech, giving the line a literary weight.
The artist uses it to praise his partner: "t'es mon acolyte" ("you're my accomplice"), elevating her from just a partner to someone fully trusted and bound to him through loyalty.
Lacrim's "Comme Toi" is a really interesting track where he's basically telling this person how much they mean to him, almost like they're his everything. He sees himself as their "sécurité" [security], promising they'll "plus jamais peur du froid" [never again be afraid of the cold]. It's clear he's super dedicated, saying he'd put in "tout les efforts" [all the efforts] for them.
He wants the best for them, talking about them wearing "du Hermès, des parures en roro" [Hermès, gold jewelry], and he's not shy about his own lifestyle, mentioning he "roule la nuit bébé, je vais trop vite / Pas de limite" [drives at night baby, I go too fast / No limit]. He calls them his "meuf, ma timp, t'es mon acolyte" [girlfriend, my woman, you're my sidekick], which is a pretty cool way to say they're always together, like a team. He even talks about needing to relax with them, whether "à Ibiza / Ou à mi casa" [in Ibiza / Or at my house]. It's a song about intense loyalty and a fast-paced life shared with someone special.