Charol literally translates to "patent leather," a type of glossy, often black, leather.
In the context of the song, the line "Charol y Sully mataron el amor en el ambiente" is a direct reference to the characters Charol and Sully from the popular Puerto Rican reggaeton song "Sully" by Jowell & Randy. In that song, Charol and Sully are depicted as a couple whose toxic relationship ultimately destroys their love. Arcángel uses this cultural reference to convey the idea that their own relationship became similarly destructive, killing the love between them.
Have you ever missed someone, but knew you were better off apart? That's the feeling at the heart of "Te Extraño" (which means I Miss You). Arcángel and his collaborators sing about a relationship that felt like a game where both people played, and ultimately, both lost. The song is a bittersweet look back at a love that was intense but also damaging.
The lyrics are filled with this conflict. The singer admits, "A veces te extraño, mami / Pero de cerca nos hacemos daño" (Sometimes I miss you, baby / But up close we hurt each other). He's not trying to get back together or figure out who was to blame. Instead, he's reflecting on how their own negative energy might have caused the breakup, saying they repeated the idea of ending things so much that it finally happened. It's a song about remembering the good times while accepting the painful reality that some connections are best left in the past.