Modifiers matching pretender:

• suave,
• unfaithful,
• talented,
• diabolical,
• charming,
• handsome,
• psychopathic,
• passionate,
• snooty,
• jealous,
• murderous,
• remorseless,
• dapper,
• urbane,
• secretive,
• chivalrous,
• aloof,
• creative,
• sexually-confused,
• literate,
• deceitful,
• two-faced,
• cultivated,
• enigmatic,
• inventive,
• immoral,
• mysterious,
• ethical,
• arrogant,
• cultured,

Simple categories matching murderous:

• king,
• pretender,
• person,
• conqueror,
• tyrant,
• villain,
• malcontent,
• magician,
• killer,
• genius,
• hunter,
• soldier,
• vampire,
• terrorist,
• dissident,
• criminal,
• traitor,
• father,
• psychopath,
• royal,
• fugitive,
• spy,
• robot,
• clown,
• politician,
• weapon,
• thug,
• assassin,
• vigilante,
• autocrat,
• dictator,
• fascist,
• agency,
• wizard,
• bully,
• hero,
• tycoon,
• snob,
• hacker,
• warrior,
• revolutionary,
• thief,
• sidekick,
• demon,
• mastermind,
• gladiator,