sekkekkyuu ae3803 "red blood cell" (赤血球 ae3803) - cells at work! (hataraku saibou) (はたらく細胞)

sekkekkyuu nt4201 "red blood cell" (赤血球 nt4201 / 後輩赤血球) - cells at work! (hataraku saibou) (はたらく細胞)

sekkekkyuu aa5100 "senpai sekkekkyuu" red blood cell (赤血球 aa5100 / 先輩赤血球) - cells at work! (hataraku saibou) (はたらく細胞)