Megane-kun, also known as Dexter in certain localizations, is a hamster defined by unique tan fur markings encircling his eyes, naturally resembling glasses. This distinctive feature, consistently emphasized across media, is inherent and not an accessory, as shown in appearances like the game *Rainbow Rescue*. He lives in a glasses store operated by his human companion Curtis, an optometrist.

Dexter embodies a refined, well-educated persona. He frequently demonstrates intelligence and linguistic knowledge, crafting Latin mottos for the Ham-Ham group, aligning with his sophisticated, gentlemanly demeanor. However, he occasionally reveals pettiness, particularly within his rivalries.

His key relationships involve enduring dynamics within the Ham-Ham group. Dexter shares a complex friendship with Howdy, marked by frequent conflicts often rooted in their mutual affection for Pashmina. This rivalry recurs across multiple seasons but diminishes in focus after Season 4. Dexter's romantic feelings for Pashmina remain unreturned; she typically ignores him or mediates his disputes with Howdy, viewing their advances as immature.

Another significant interaction involves Hannah, who briefly develops an infatuation with Dexter, drawn to his perceived sophistication and caring nature. Her admiration fades swiftly, however, after witnessing his susceptibility to motion sickness, which she interprets as a lack of fortitude.