Padma rushed up in time to hear the crunch of bones and she winced on Demelza's behalf, mind racing and wand in her hand a second later. A stilling charm was more complex, and Padma had never seen anyone try to use it on the Willow. It would probably work, but she didn't want to risk it - and she wasn't terribly practiced with them anyway. A stunning charm was intended for a living target, but she wasn't sure if that included plantlife. (She'd have to look that up later.)
She settled for the simplest option, though likely not the most comfortable for the poor girl. She just braced herself, and then summoned Demelza to herself - it was the quickest option too, before the Willow had a chance to land another blow.
Demelza flew toward her, and she was a lot heavier than the sort of small objects one USUALLY summoned, so when she thunked into Padma, Padma found herself unceremoniously dumped on her arse, trying to catch the other girl and keep from jarring her while making sure they were both firmly out of the tree's reach.