Fixed/Absolute position only in one section

I’m trying to create the effect on the pentagram individual team member page where the image stays in place until all the content is finished/scrolled through. Scrolling interactions wont work because the content will change based on the varying length of the bio, and using an overflow visible on scroll (within a column) is clunky and counterintuitive.

Is it possible to create absolute position just for this section? Or is there another solution all the more experienced brains know that I don’t?

Thanks for you help!!

Here is my site Read-Only: