Modifiers matching sidekick:

• supportive,
• self-regarding,
• loyal,
• affable,
• stiff,
• good-hearted,
• ragged,
• dim-witted,
• unoriginal,
• vengeful,
• cultured,
• foppish,
• murderous,
• spunky,
• faithful,
• resourceful,
• gullible,
• twittish,
• gentle,
• snooty,
• tall,
• polite,
• well-mannered,
• intelligent,
• predictable,
• devoted,
• upper-class,
• steadfast,
• stubborn,
• evil,
• fierce,
• trustworthy,
• wilful,
• long-suffering,
• childish,
• driven,
• adventurous,
• scheming,
• unintelligent,
• bumbling,
• diminutive,
• fussy,
• cute,
• upbeat,
• dutiful,
• sophisticated,
• richly-voiced,
• dependable,
• wild-haired,
• narcissistic,
• eloquent,
• unhygienic,
• spendthrift,
• spoiled,
• malevolent,
• rigid,
• erudite,
• friendly,
• brave,
• whiny,
• inarticulate,
• cheery,
• optimistic,

Simple categories matching bumbling:

• detective,
• thug,
• person,
• comedian,
• invalid,
• sidekick,
• mayor,
• bureaucrat,
• policeman,
• nerd,
• actor,
• clown,
• fool,
• geek,
• child,