* They: If "we" refers to a group, the antonym could be "they." For example, "We went to the store, but they stayed home."
* You: If "we" is used to include the listener, the antonym could be "you." For example, "We should clean up this mess," could be countered with "You should clean up this mess."
* I: If "we" is used to refer to a specific group that excludes the speaker, the antonym could be "I." For example, "We're going to the party, but I'm staying home."
The best antonym for "we" will depend on the specific situation and what the speaker is trying to convey.