File:Sinon Millennium Twilight character design.png

Source: Dengeki Online: http://dengekionline.com/elem/000/001/447/1447455/. Screenshot taken from Gematsu. Link: https://gematsu.com/gallery/albums/accel-world-vs-sword-art-online/january-12-2017/Accel-World-VS-Sword-Art-Online-Millennium-Twilight_2017_01-12-17_008.jpg