This is the kit I remember most fondly from the ones I put a lot of effort into.
I struggled with the unfamiliar modification work while looking at examples from senior builders in magazines and online articles.
Looking at it now, the antenna is too short and I don't quite understand the intention behind the detail-up, so it's one of the Gunpla kits I want to try again someday.
▼Work done
Head: Sharpened the antenna, moved the mask to the top and back.

HGUC Hi-ν Gundam | ねこち's Gunpla works