It looks like the phrase is highly fragmented. It could refer to fan fiction, a niche roleplay duo, or characters from a visual novel, anime, or webcomic (possibly BTS Suga ? Naomi from Coraline or 6114 ? Sergei from Killing Stalking or *Anime’s Sergei ?).
If you are looking to write a "solid essay" on this subject, consider structuring it around these three pillars: duo tl sergei naomi suga new
Competitive or casual "duos" in titles like Valorant , Apex Legends , or League of Legends where players use these names as handles or character callouts. It looks like the phrase is highly fragmented