How to get only TEXT_NODE with kuchiki

I have this example HTML which I want to parse with kuchiki:

<a href="https://example.com"><em>@</em>Bananowy</a>

I want only Bananowy without @.

A similar question for JavaScript: https://stackoverflow.com/questions/6520192/how-to-get-the-text-node-of-an-element/6520267#6520267