[quote=@Guardian Angel Haruki]
I wouldn't say she's lazy...

...I would say it's more of a sense of Self-Preservation.
[/quote]

She's a redcap, which are pretty formidable on their own. She knows Bavlorna's weakness, which will make the hag much less formidable than she would be otherwise. And she'd have six other people backing her up, providing the strength and safety of numerical superiority.

A case could be made that she would have a good chance of taking out the one she hates the most and living to tell the tale if she helps out.

And before you go saying that she could have all of the reward and none of the risk by just staying in the kitchen, consider this: Would listening to a battle happening in a different room really be as satisfying as being there in the action, seeing the look on Bav's face as her weakness is exploited, and bathing in freshly spilled hag blood as seven people rip and tear until it is done?