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Similar to Season 1, the ending theme sequences of season 2 depict Ichika and the IS pilot girls running. A few episodes of Season 2 are anime-exclusive only with small important parts from the light novel, all involving Phantom Task. The second season with blood scenes restricts the series' age recommendation to be put to 17+. Throughout the whole anime, not a single tournament was complete due to disruptions.
From episode 10, the ending sequences change slightly to just show the girls running, after Ichika, in the order introduced. After a small gap, the rest of the girls follow, lined in the order they are introduced. Ichika is in front of the girl who most recently joined his side following close behind.
One thing to note about the ending theme sequences of Season 1 is that, from episode 1 to 9, they depict Ichika and all the IS pilot girls close to him running in a certain sequence. The anime excludes/changes certain aspects of the light novel. The fight scenes involving the IS alternates between drawings and CGI. What it Takes to Be a Hero|What It Takes To Be A Hero
Mysterious Lady (episode)|Mysterious Lady
Premium Rare "Five Cross" Card "IS01-P02". Episode 13: A Memory of a Summer (Normal and Long Vacation Editions). The Transfer Student is my Second Childhood Friend Ending: Super∞Stream by Yōko Hikasa, Yukana, Asami Shimoda, Kana Hanazawa and Marina Inoue (subsequently).
Opening: Straight Jet by Minami Kuribayashi. The anime's soundtrack is composed by Hikaru Nanase, while most of the themes are vocalized by Minami Kuribayashi. UNDEADITED INFINITE STRATOS SEASON 1 SERIES
Series Script: Atsuhiro Tomioka, Chinatsu Hōjō, and Fumihiko Shimo. Chief Animation Director: Takeyasu Kurashima.