* Subordinate: Implying someone who is subservient or less important.
* Servant: Suggesting a lack of autonomy or being at someone else's beck and call.
* Sucker: Conveying the idea that the helper is easily taken advantage of or manipulated.
* Interloper: Suggesting that the helper is unwelcome or interfering.
* Busybody: Implying that the helper is nosy or intrusive.
* Mousy: Suggesting a lack of confidence or assertiveness.
* Doormat: Indicating someone who is easily taken advantage of and lacks boundaries.
The specific negative connotation will depend on the context and the intention behind the word.