Be sensitive to the other improvisers. Do anything that your character would do to support / move the story forward with or for them.
Your emotional connection is key to the reality of the scene.
You don't have to blindly "yes, and..." them, but rather "yes, and ..." the scene.
If your character has conflict with another character, it wouldn't feel real to blindly agree with them.
Be true to your character and argue with them, whatever, but move the scene forward.
Be sensitive to the real connection at all costs.