The thief with motivations beyond gold
The cliché thief steals from greed. Boring. Your rogue gains depth when you define a specific motivation: revenge against the noble who killed his family, financing his sick sister's operation, recovering a family object seized by the crown, climbing a guild to change it from within. Motivation sustains hard decisions: does he steal from a sick old man or not? Without clear motivation, the character becomes random.
Vary socioeconomic origin. Fantasy repeats the street orphan who learned to steal to survive. But interesting thieves come from diverse origins: fallen nobles unwilling to admit their new trade, expelled former priests using church knowledge to rob them, ex-soldiers applying military infiltration to urban heists, bored bourgeois women stealing for adrenaline more than money. Lies of Locke Lamora exemplifies a world of rogues with diverse origins.
The thief can also have their own moral codes. Steals from rich but not poor travelers. Kills only in self-defense. Never betrays whoever gave him their word. These codes generate dilemmas when they conflict with the mission. Robin Hood, Arsène Lupin and Selina Kyle (Catwoman) show complex thieves with twisted but present honor.
Anatomy of a street name
Good street nicknames follow three rules: short, descriptive, easy to shout in a chase. 'Ren', 'Vex', 'Nyx' work because they pronounce in one syllable. If your character is named 'Aramendelantriel Stargold', nobody will use it; he'll quickly become 'Ari'. Better to start with a short name and add long epithets for formal introductions.
Surname-guilds work as credentials. 'Vex of the Crows' indicates immediate affiliation: if the Crows are feared, Vex inherits that reputation. If they're amateurish, Vex carries that stigma. Guilds also allow dramatizing conflict: your character can have surname 'of the Black Veil' even if no longer in the guild, making him a target of old colleagues.
Epithets tell a feat, failure or distinctive trait. 'the Hundred Locks' implies specialization in opening locksmithies; a noble hires him specifically for that. 'the Never Bled' suggests pure infiltrator: never had to fight because always escaped. 'the King Robber' implies history: when did he rob a king? That anecdote can be seed of an entire campaign. Avoid generic epithets like 'the Swift' or 'the Cunning': they communicate little and feel template.
Rogues across systems and genres
In D&D 5e, Rogue archetypes (Thief, Assassin, Arcane Trickster, Inquisitive, Mastermind, Scout, Swashbuckler, Soulknife) generate very different personalities. The Assassin fits with grim nicknames like 'Warm Blade' or 'Dawn Knife'. The Arcane Trickster works with more playful names: 'Pip of the Hundred Floors' or 'Mox the Secret Seller'.
In Blades in the Dark, the entire system revolves around rogues forming a criminal crew in an industrial city. Names should sound hard and modern: Wrenn, Sable, Thorne. Game complications (Heat, Entanglements) reward characters with deep street history. In Shadowrun, runners are tech rogues; names like 'Glitch', 'Trace' or 'Decker' work idiomatically.
For novels like Six of Crows or Mistborn, rogues can be group protagonists with names that sound varied among themselves. If all end in '-ax' or '-yn', they confuse. Mix: Kael (short, guttural), Mira (soft), Drax (hard, long), Pip (playful). Phonetic diversity helps the reader remember who is who in fast action scenes with multiple protagonists.
Frequent mistakes designing rogues
Mistake 1: Rogue as funny sociopath. Hollywood normalizes the thief as charming without remorse. But a character who systematically steals should have internal consequences: paranoia, insomnia, difficulty trusting, structural loneliness. These traits don't make the character depressing: they humanize him.
Mistake 2: Invincible stealth. If your rogue never fails stealth, it gets boring for table and reader. Narrative tension is born from failure risk. Allow scenes where your character is seen, captured, almost dead. The Dark Knight with Catwoman shows failures that enrich the character. Mistake 3: Confusing rogue with professional assassin. The rogue has breadth: thief, spy, scammer, infiltrator, locksmith opener, forger. Reducing him to 'the one who kills from behind' impoverishes him.
Mistake 4: Name that betrays profession. A noble in a court can't be called 'Silent Edge' without raising suspicion. Your rogue probably needs a normal civil name and street nickname used only in criminal environments. 'Marcus Aldred' before nobility, 'Edge' in the guild. Design both identities. Mistake 5: forgetting social network. A solitary rogue is less interesting than one with a network of informants, debtors, ex-partners, neighborhood kids who cover him. Each minor NPC expands the world and creates hooks for future sessions. Mistake 6: generic guilds. If your guild is called 'The Assassins' without more detail, it lacks specificity. Better: 'The Crows of the South District, specializing in temple robberies, founded by an expelled priestess 80 years ago'.