Gaius Antiphon/Story
NOISZ Ignition
Gaius was trapped in the Void, and his mind and body were lost there. All that remained of him was his giant suit of armor and his remorse.
Gaius sees the immense energy trapped within the main character's NOISZ and reaches out to it. This causes the main character to be suddenly transported to the World of Music. Gaius' armor appears in the city and starts rampaging. Beyond, exhausted and weak, runs away from the armor. Meanwhile, Arietta commands her NOISZ Beasts to fend off the armor.
In Story C (and Story Long A), the main character confronts the armor to protect their friends. In Story C, they are victorious. The armor fades away, and they absorb its energy. In Story Long A, they fail to defeat the armor and subsequently die.
NOISZ re:||VERSE
Gaius only makes an appearance here in flashbacks; see History for more information.
NOISZ episode G
Gaius travels to the World of Music using the ARIA and Sonic Blade. Upon arrival, he runs into Miria. Gaius is believed to be the subject of a prophecy about the first human to visit the World of Music bringing ruin to it, so she attacks him. However, she stops seeing him as a threat after the fight. She accompanies him as the two explore the World of Music together. Throughout their adventure, Gaius and Miria grow closer. Eventually, after a trip through Tacet Forest, Kristoph brings them to the castle. Marziale confronts them. She assures Miria she will send Gaius back to the human world after removing his memories.
After Miria performs the memory erasing procedure and kisses Gaius in the process, Marziale seals him in the Void. There, Gaius meets Alpha, who gives him the Void Crystal. Miria rescues him and returns him to the human world.
In the game's post-credits scene, Gaius Antiphon has been impaled by a massive blade. As he is dying, he remembers what was important to him. He asks Arisa to tell her sister that he's proud of both of them. Arisa says she'll think about it, then says goodbye. Gaius tumbles into infinite darkness.
NOISZ STΔRLIVHT
Gaius' presence slowly grows throughout the story. His first appearance is in Chapter 2.IV. Sera sneaks into his office and points a handgun at him. He laughs this off. After Gaius' taunting, Sera shoots, and Stornel catches the airsoft pellet.
Sera tries to ask Gaius a few questions, mainly about Beyond, but Gaius scoffs at her ignorance. When Grace tries to link, Gaius promises to let Sera go if she leaves him alone. Reluctantly, she agrees to this.
"Beyond" reveals to the Producer that her plan is to have STΔRLIVHT kill Gaius Antiphon. "Beyond" explains her reasoning to the Producer, namely to protect music from disappearing because of Gaius' callous solution to the Silencing.
In Chapter 6, STΔRLIVHT heads into the basement of the Antiphon building to confront Gaius and protect music. After her fight with Gaius, Grace is impaled by Gaius' swords. She wishes goodbye to Sera. Gaius then taunts the remaining STΔRLIVHT members, claiming he has several more lives to go. The remaining girls respond by declaring their intention to finish him off for good and avenge Grace.
