Notes:
In frame 5, where Jemma is scanned, you can see the nanobot activity is down to 56%, which is quite a normal value. Her hair starts glowing at about 70% activity.

Other than the glow effect, the nanobot upgrade (which is a pretty normal hair styling method here) can shape and color her hair in a variety of ways, she can even use computer software to program the nanobots to style the hair as she wishes (inside the limits of the hair length, of course). I should have made the scan interface a bit more advanced, but I was pressed for time and I have lost my old interface symbols...

Alas...