
Sidekick
Not Interchangeable
Don't confuse 'sidekick' with 'partner'; sidekicks have a more supporting role.

He may help a lot, but he's not my partner; he's my sidekick.
Less Capable Implication
'Sidekick' sometimes implies a less skilled individual, not just a helper.

I'm not just a sidekick; I solved the case too!
Affectionate Tone
Though 'sidekick' can suggest inferiority, it's often used affectionately.

My little brother's my sidekick; he follows me everywhere.
Compare with
AideAllyAssistantAssociateCohortCompanionFriendPartner
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