I was wondering when someone would do this! I knew the red horns reminded me of that!

Also, Star's is an actual headband, right? I haven't seen the show. Zero-Two's one the other hand, are actual horns. She has Klaxo Sapien DNA, so that's where they come from. From what I know, she can have them extend and branch out to extreme lengths when in the stampede mode of her mech, parts can be broken and filed off without pain, and they can transmit her memories psychically via touch.