Glue the pieces of plastic together with glue. Like modifying a Gundam, I equipped him with 3d-scanned scrap materials. T-shirts: https://suzuri.jp/babyforce1812/12223779/big-t-shirt/l/white
https://suzuri.jp/babyforce1812/12223779/big-t-shirt/l/white
https://adam.jp/items/0xb30fc2d754c88c451275b743b6f530f19f643683/0x00000000000100000301000000137a72
https://adam.jp/items/0xb30fc2d754c88c451275b743b6f530f19f643683/0x00000000000100000301000000130e46