Totally! Holly sounds cool! Courageous characters are fun to read about!
My hero character, Gavril, is also a side character. He’s the main character’s older brother, and it’s fun to use them as foils for each other, especially since my MC is basically Family Disappointment no. 1. (At least, she sees it that way XD)
Another odd thing I’ve noticed is that it’s really hard to write a hero character in a secondary position. I don’t know if this only happens to me, but the hero tends to pull all the other characters into their orbit, so to speak. The narrative almost starts to revolve around them. Have you ever noticed something similar?
Without darkness, there is no light. If there was no nighttime, would the stars be as bright?