1girl, arknights, arm_rest, artist_name, bare_shoulders, bird, black_one-piece_swimsuit, bounsies, demon_girl, demon_horns, detached_sleeves, expressionless, hair_between_eyes, horns, infection_monitor_(arknights), long_hair, looking_at_animal, looking_to_the_side, lying, lying_on_water, official_alternate_costume, on_side, one-piece_swimsuit, pointy_ears, ponytail, red_eyes, sandals, shining_(arknights), shining_(silent_night)_(arknights), solo, swimsuit, thigh_strap, thighs, very_long_hair, water, white_background, white_hair