robin (honkai: star rail), honkai: star rail, honkai (series), chinese commentary, commentary request, highres, official art, promotional art, 1girl, bass guitar, bikini, bird, blue hair, breasts, character name, copyright name, copyright notice, flower, full body, green eyes, hair between eyes, halo, head wings, holding, holding bass guitar, holding instrument, holding microphone, innertube, instrument, jewelry, large breasts, long hair, looking at viewer, microphone, musical note, navel, necklace, official alternate costume, open mouth, partially submerged, robin (summeretto) (honkai: star rail), sandals, sarong, single hair intake, smile, solo, sunflower, swim ring, swimsuit, very long hair, white bikini, wings