Under stairway diagonal wall?

Hi! I’d love to be able to create a wall that gets taller as the stairs go up so that it has a seamless/integrated look with the stairs. Right now, the only way I can figure out how to do this is to make a wall with many segments, each 8 inches higher than the last. It’s a bit time consuming and exhausting and I would love for it to be an easier process! Thank you!