井口裕香
For "A Certain Scientific Railgun S", it has six pieces of theme music, two opening themes and four ending themes. The first opening theme is "Sister's Noise" by fripSide and the first ending theme is "Grow Slowly" by Yuka Iguchi, the latter of which was released on May 15, 2013. The song "stand still" by Iguchi is featured as the second ending theme for episodes 11 and 14. The second opening theme is "Eternal Reality" by fripSide and the third ending theme is "Links" by Sachika Misawa. The song "Infinia" by Misawa is featured as the fourth ending theme for episode 23.