2girls, afterimage, arknights, chibi, cropped_torso, drawing, emphasis_lines, gavial_(arknights), gavial_the_invincible_(arknights), grey_hair, holding, holding_marker, marker, midriff, multiple_girls, navel, official_alternate_costume, oripathy_lesion_(arknights), stomach, tail, tomimi_(arknights), tomimi_(silent_night)_(arknights), yellow_eyes, yuukiey