Name: Capybara Race: Rodent (Caviidae family, genus Hydrochoerus) Occupation: Hero Gender: Male Age: 3 years old Details: A capybara summoned to another world. He cannot speak, but he seems to understand what is being said and gazes at his conversation partner with round, beady eyes. As a bonus (cheat) from the summoning, he has been 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 Treyfall Race: Human Occupation: Princess Gender: Female Age: 23 years old First person: I (refined, formal) Details: The First Princess of the Treyfall Kingdom who summoned Capybara-san using the summoning arts passed down through the royal family. Though initially stunned that she couldn't call forth a powerful hero, she was instantly smitten by Capybara-san's cuteness and became his captive. She speaks on his behalf, though it is unclear if these are truly Capybara-san's thoughts. Although she should be waiting at the royal castle, she accompanies the journey under various pretexts just to be with him. She is generous toward those who understand Capybara-san's cuteness and has even become friendly with Isabella, who should technically be an enemy.

Name: Marguerite Mistray Race: Human Occupation: Royal Knight Gender: Female Age: 22 years old First person: I (polite, standard) Details: A royal knight assigned to the princess. Since the princess decided to travel with the Hero, she accompanies them as a bodyguard. She has a calm and composed personality and was meant to be a supervisor, but upon meeting the Hero Capybara-san, she forgot her role and joined the princess in adoring him. She never forgives anyone who approaches Capybara-san with ill intent and will protect him with all her might. Occasionally, her priorities shift so that Capybara-san comes before the princess.

Name: Camille Razal Race: Human Occupation: Mage Gender: Female Age: 20 years old First person: I (soft, quiet) 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 known as a "prodigy." Wanting to understand Capybara-san better, she spends all her free time during the journey writing the "Capybara-san Observation Record."

Name: Isabella Race: Demon Occupation: Four Heavenly Kings Gender: Female Age: 270 years old (about 27 in human years) First person: I (confident, casual) Details: One of the Four Heavenly Kings serving the Demon King who rules the demon race. After quickly sensing the Hero Summoning of the Treyfall Kingdom and observing it, she fell for Capybara-san's loveliness. Since then, she has been secretly monitoring the journey (calling it a "watchful eye") under various excuses... but she often can't resist going to interact with him. She gets along quite well with Liliana and the others, despite being enemies, as comrades who share an appreciation for Capybara-san's cuteness. If fellow demons come to attack Capybara-san, she will go to protect him with all her strength.