The official website for the upcoming anime adaptation of ONE and Yuusuke Murata’s One Punch-Man manga has released character designs for the two new cast members that will voice the characters Sonic and Tatsumaki in the October anime series.
- Yuuki Kaji (Eren Jaeger in Attack on Titan) will voice the Speed of Sound Sonic (Onsoku no Sonic), a villainous assassin
- Aoi Yuuki (Madoka Kaname in Mahou Shoujo Madoka★Magica) will be voicing as Tornado of Terror (Senritsu no Tatsumaki), a S-class rank 2 esper hero
- Makoto Furukawa (Banri Tada from Golden Time) will voice Saitama
- Kaito Ishikawa (Tsumugu Kihara from Nagi no Asukara) is voicing as Genos