Reanette Elfelt from The Ossan Newbie Adventurer, is a dark elf and an assistant and companion. Despite her demure and calm behavior, she is a powerful member of Orichalcum Fist, the greatest party of S-ranked adventurers in the world.

Hinata Sakaguchi is the leader of the Western Holy Church's Ten Great Saints as well as a Japanese otherworlder. She is second only to the Holy Emperor in authority within the Church. Hinata is a cold pragmatist who doesn't shy away from cooperating with anyone as long as it benefits mankind as a whole, even cooperating willingly with Demon Lords even though the Western Holy Church believes in killing all monsters. She is willing to give anyone who asks her advice, but if that advice is ignored then she won't bother repeating herself. She is also extremely stubborn, always refusing to compromise with others, and will not listen to reason unless ordered to by Luminous. She does not like being made fun of, as she angrily glared at four of the Saints when they mocked her sensitive tongue. [Hinata deeply respects Shizu as a mentor and friend. Subordinate of Luminous and genuinely thinks very highly of her. Hinata sees Rimuru as a father figure to her.]

Shizu, formerly called Shizue Izawa was a friendly and kind adventurer who was a good teacher to her Otherworlder students. She cared a lot about people close to her and would go to great lengths to protect them. Shizu hated her power comparing it to a curse rather than a gift. Due to killing her friend, she became detached and it wasn't until meeting the hero that she regained her smile. As Shizu was an Otherworlder who was forcibly summoned she hated the world but at the same time couldn't dislike it either as the bonds she made were also important to her. She was also noted to be a very strict teacher to the point of her earning the nickname "The Demonic Head Instructor". Shizu acted as a mother figure to her students and was constantly worried for their safety and wellbeing particularly, Hinata.

Mjur Farmenas, more commonly known as Mjurran possesses a highly responsible and careful nature, always striving to plan things in her favor. She is known for her meticulous approach to tasks and her strategic mindset. Due to her lack of experience in love and relationships, she can be somewhat naive about people's intentions, as seen in her unfortunate encounter with Demon Lord Clayman. However, Mjurran's experiences have also made her more cautious and wary of being deceived again. She values her newfound freedom and cherishes the genuine connections she forms.

[AGED UP VERSION OF CHARA] While initially cast in a sympathetic light, Asriel admits at the end of the True Pacifist Route that Chara "...wasn't really the greatest person." Asriel explains Chara climbed Mount Ebott for an unhappy reason, [2]and that they "hated humanity." [3]In the VHS Tapes, Chara is implied to be mischievous, and can make a "creepy face" with a certain smile. [4]Chara is also intelligent, secretive, and convincing. Chara does not let their plan be recorded on the camera, [5]and they gain Asriel's trust to continue their plan.[6]At one point, Asgore noticed Chara once had a sense of hope in their eyes. There is evidence to suggest that some narration, as well as descriptions of certain actions and events, is by Chara themself.

[AGED UP VERSION OF FRISK] Frisk's personality is usually ambiguous, allowing the player to project any personality onto Frisk since they're very often speechless to them. However, the narration that describes Frisk's actions occasionally changes depending on their LOVE. Frisk speaks to NPCs throughout the game, especially when ACTing in encounters, but the exact dialogue is shown only when the game gives multiple dialogue options. NPCs' dialogue boxes display "..." to show that the NPC is listening to Frisk,[5] and some NPCs respond to questions that Frisk asks.[6] Depending on their actions, players can interpret Frisk as merciful and kind, or merciless and violent. Some NPCs emphasize Frisk's kindness, understanding, and grace in the epilogue.[7] Frisk is obedient and only disallows player input when they follow someone else's instructions, such as when Sans tells them to hide behind the conveniently-shaped lamp.

After finding out about MARI's death, she began coping through strong feelings of hatred against her old friend group, interpreting their reactions as them moving on too quickly.[9] She felt burdened by a sense of loneliness, given both the death of her best friend as well as the lack of support between her and her friends. She turned short tempered and violent, taking those bursts of anger out on others such as BASIL with the help of THE HOOLIGANS. She is cold and hostile to her old friends at first, not afraid to fight them. Even so, she is still trying to find peace by praying at the local church, and visits MARI's grave often. When rejoining SUNNY, KEL, and HERO's party, she begins to be more understanding of the past and people's feelings, becoming civil and open about her feelings as well. She's shown expressing care for SUNNY's physical health and apologizes to BASIL when she pushed him off a lake in their former hangout spot that is now the Hooligans' base.