
The armor's identity was highly associated with being either a member of the Thirteen Heroes or Platinum Dragon Lord himself. According to some unknown bard, it made mention of a hero wearing an armor forged in platinum. Adventurers like Momon happens to caught wind of his legendary exploits from listening to one of the bards' songs.

Tales of his past heroic deeds were already long since recorded and pass down by the bards. In the main timeline, he continues to rely on using the armor suit from back then up to the present-day setting of the New World. Overall, this piece of armor is more or less around two centuries old and was said to have been often primarily used by Platinum Dragon Lord since his time as a member of the Thirteen Heroes. Even two hundred years later, Rigrit Bers Caurau still happen to respectfully and honorably treat the armor as her close friend over Platinum Dragon Lord. Eventually, members of the Thirteen Heroes became aware of the truth of who he really was behind that armor, leading them to complain to Platinum Dragon Lord about his deception towards their group. Different from his real form as a dragon, the empty suit of armor serves as a unique persona, moving accordingly by him in the heroes' ranks to fight against the Evil Deities.

Mikoto battling Frenda Seivelun and Mugino Shizuri.Toaru Kagaku no Railgun title card for sister's noise. The single release features the full version of the song.

The opening for Toaru Kagaku no Railgun S was written, composed and arranged by Satoshi Yaginuma and sung by Yoshino Nanjo under their band name fripSide. Both Yaginuma and Nanjo agreed that the dancers who performed as the Sisters contributed the most during the shooting. The promotional video was shot amidst cold weather conditions (one night's temperature was 3 degrees Celsius), requiring the cast members to wear jackets and thick clothing as soon as a scene is finished shooting. Despite the attack, the facility manages to create two more clones, which look like middle-aged twins with a rotund build. fripSide is featured in the video as they walk across an industrial complex, where they witness the sabotage of a certain laboratory where living beings who look closely alike were possibly made. The video for "sister's noise" adopted the concept of the Sisters, using them as background characters and as dancers who perform alongside the duo of fripSide.
