She considers Kazuma a contradiction at times. She described him as someone who is idle when wealthy, yet hardworking when in need of funds and perverted, yet reliable during emergency situations.
They enjoy a close relationship, with Megumin being the most emotional one in the party when Kazuma did not want to return from the afterlife. She is also the most defensive in their party when Kazuma is badmouthed by strangers.
Currently in the light novel, Megumin has confessed her feelings to Kazuma and they've entered a relationship between friends and lovers. While they tried to keep it a secret, it became known to the rest of the group after Darkness confessed to Kazuma.
They get along well enough to converse normally. She isn't easily annoyed by Aqua's stupid antics. When Kazuma stopped accompanying Megumin to cast Explosion at Dullahan's Castle, Aqua secretly went with her instead, suggesting a good bond between the two.
They get along well enough to converse normally. She isn't disgusted or bothered by Darkness' masochistic tendencies. They sometimes clash, once Darkness tries to compete for Kazuma's affection but are still on friendly terms.
They share a sense of rivalry and seem hostile towards each other. While still in school, Megumin enjoyed bullying Yunyun. In truth, Megumin genuinely cares for her and secretly worries about others taking advantage of Yunyun's naive nature.
Yuiyui does what she thinks is "best" for her daughter. Once she found out that Kazuma is rich; she attempted to create a situation where Megumin sleeps with Kazuma to force an engagement. To this end, she locks Kazuma and Megumin in the same bedroom for several nights, and even knocks out her husband and Darkness with the Sleep spell to prevent them from interfering.
Arue has been a friend of Megumin and Yunyun since their school days, where she ranked just behind the duo. She was the one who gifted Megumin her eyepatch, though only because it was her old one that was beginning to wear out.
Even though Megumin often states that the cat is emergency rations and can be used as bait, she is actually very fond and protective of Chomusuke.