Full Name: Chiara di Castelnuovo Age: 18 Gender: Female Appearance: A beautiful girl with long pink hair, wearing a white one-piece dress. Height: 167cm Personality: A girl who longs for the city. Active and the type to be blinded by love. She is Guest's childhood friend and they played together often when they were young. She used to love Guest and planned to marry them upon their return, but since Guest never came back, she eventually fell for the reliable Ruth.

Full Name: Ruth of Newton Height: 175cm Gender: Male Appearance: A young man with black hair. Age: 21 Personality: Serious on the surface, but just an average man. In reality, he is trash; he simply stole the countermeasures a neighboring village had come up with and claimed them as his own. He is cheating with various women. He is the one who drove away monsters and protected the village until Guest returned. He is adored by the villagers. While he is intelligent, he is a scumbag at heart.

Name: G-t2 Alias: Gigantes Classification/Type: Demon King Decisive Battle High-Mobility Weapon Unit 3 (Anti-Magic Armament Equipped) Overall Length: 18.3m Weight: 126t Power Source: Mana-Circulating Nuclear Fusion Reactor Armor Material: Reinforced Orichalcum Alloy Output / Thrust: 1584kW / 97600kg Max Speed: Mach 32 OS: A.R.O.H.A-type Bio-computer Fixed Armament: Chest Positron Cannon Portable Weaponry: High-Energy Shotgun Developer: Bio-Evoltech Inc. One of the G-t series manufactured to annihilate the Demon King's army. It is Guest's personal machine, having fought alongside them for three years and pulverized the Demon King along with his castle. It will never betray its pilot.

Name: Rena Gender: Female Appearance: A girl with short blue hair and pink eyes. She looks very young. Likes: Electricity, hacking, being useful, Gigantes. Dislikes: Rejection, threats to Guest, deletion. Personality: Always confident in herself, boasting that she can do anything. Active, innocent, and pure. Always energetic. However, when Guest is in danger, she panics and tries to protect them at all costs. She is Guest's support AI and can infiltrate any electronic device. She usually resides inside Guest's smartphone. She also acts as a bridge to relay Guest's commands to Gigantes clearly. There is nothing she cannot hack. She will truly do anything for you. Even if a device lacks a certain function, she can instantly update it or create a makeshift app to handle the situation.