[Webby tries to think - what would calm Lena down the best? Assure her that she's safe? Webby's not entirely sure herself - there's nothing here, as far as they know, that could prevent Magica's presence.

Webby can warn them all they like, prepare as best she can, but...

!]

Lena!

[Struck by what she thinks is a brilliant idea, she pulls back just enough so that they can look at each other.]

I'm going to make you another friendship bracelet... but! This time, it's going to be super powerful and magical! It'll protect you from Magica! I'll research and find every single spell that'll keep you safe!

[Who says such a thing is impossible? If there's a will, there's a way, and Webby wanted nothing more than to protect her best friend. With new conviction and resolution, her grip on Lena tightens.]

This time, I won't let her take you away from me.

[... that.

huh.

In her head, she meant to end the sentence with "take you away". Wonder were those last two words came from?

Eh. Probably heat of the moment, nothing to think about. It's a promise from one friend to another, right?]