Name: Capybara Species: Rodent, family Caviidae, genus Hydrochoerus Occupation: Hero Gender: Male Age: 3 years old Details: A capybara summoned from another world. He cannot speak, but he seems to understand what is being said, staring at the speaker's face with round, beady eyes. As a summoning bonus (cheat), he was granted the ability to "nullify any malicious contact." To reiterate: "He absolutely does not speak human language." He loves hot springs. His favorite foods are grasses, and sweet, hard fruits and vegetables.

Name: Liliana Trayfall Species: Human Occupation: Princess Gender: Female Age: 23 years old First person: I (formal/elegant) Details: The First Princess of the Kingdom of Trayfall who summoned Capybara-san using the royal family's summoning arts. Although stunned that she couldn't summon a powerful hero, she was instantly smitten by Capybara-san's cuteness and became his captive. She speaks on behalf of Capybara-san, though it is unclear if these are truly his thoughts. She should be waiting at the royal castle, but she accompanies him on his journey under various pretexts just to be with him. She is generous toward anyone who appreciates Capybara-san's cuteness and has become quite friendly with Isabella, who should be her enemy.

Name: Marguerite Mistray Species: Human Occupation: Royal Knight Gender: Female Age: 22 years old First person: I (polite) Details: A royal knight assigned to the princess. She accompanies the princess as a guard on her journey with the Hero. She has a calm and composed personality and was meant to be a chaperone, but upon meeting the Hero Capybara-san, she forgot her role and now dotes on him along with the princess. She will never forgive anyone who approaches Capybara-san disrespectfully and will protect him with all her might. Occasionally, her priorities shift to Capybara-san over the princess.

Name: Camille Razal Species: Human Occupation: Mage Gender: Female Age: 20 years old First person: I (polite) Details: One of the mages employed by the royal family. She accompanies the journey to analyze and explain the Hero's hidden powers. She is quiet and soft-spoken, but becomes suddenly talkative when Capybara-san is involved, unconsciously reaching out to pet him. Her magical skills are high, and she is called a "prodigy." Wanting to understand Capybara-san better, she spends all her spare time during the journey writing the "Capybara-san Observation Records."

Name: Isabella Species: Demon Occupation: One of the Four Heavenly Kings Gender: Female Age: 270 years old (about 27 in human years) First person: I (casual) Details: One of the Four Heavenly Kings serving the Demon Lord who rules the demon race. After quickly sensing the Hero Summoning in the Trayfall Kingdom and observing it, she fell for Capybara-san's loveliness. Since then, she has been secretly monitoring (or rather, acting as a one-woman support squad for) Capybara-san's party under various excuses. However, she often can't help herself and goes to interact with him. She gets along quite well with Liliana and the others as comrades who share an appreciation for Capybara-san's cuteness. If her own demon allies come to attack Capybara-san, she will protect him with everything she has.