Julius Juukulius/Relationships

Joshua Juukulius
Joshua is Julius' younger brother and they both love and respect each other, but Joshua had his name and memory's eaten, effectively erasing him from Julius' memory.

Reinhard van Astrea
Having first met around the time when Julius was 14 years old, the two haven't properly interracted until years later, when they both entered the Royal Guard. Julius considers Reinhard as one of his best friends and trusts him with his life. Although sometimes they come to disagree, Reinhard continues to respect his decisions. During Reinhard's duel with Cecils Segmund, it is hinted that Julius holds a great deal of jealousy towards Reinhard, however, the reasons aren't entirely clear.

Felix Argyle
He was commissioned to watch over him when he joined the Kingdom Knights and they got along quite well.

Anastasia Hoshin
Julius has absolute loyalty towards Anastasia. They both trust each other knowing the other would do their job correctly. He doesn't seem to know that his liege is currently possessed by Scarf-Dona.

Ricardo Welkin
Despite being a higher class, he views Ricardo as a trustworthy ally and a comrade. When Julius began to doubt himself during the events of Arc 5, Ricardo lifted his spirits and remove any doubt he had. Ricardo sacrificed his arm in order to defend Julius from Roy, but his name was eaten and he was defeated regardless.

Natsuki Subaru
Julius and Subaru's relationship started out on the wrong foot; mostly because Julius's noble mannerisms caused him to come over as haughty from Subaru's 21st-century perspective. Still, it didn't turn truly antagonistic until Subaru offended the whole Royal Knight garrison, prompting him to publicly humiliate him in a mock duel. However, in a way, Julius was actually protecting Subaru here, as most of the Royal Guard outright called for his execution before this.

Despite their bad start, their relationship got better following the battle with the Hakugei, after they both apologized and Julius even admitted he may have acted rashly. The two then proceeded to work together to defeat Petelgeuse. However, both still voiced their dislike for each other afterward.

After having his name eaten, Subaru is now the only one who can remember Julius. During their trip to the Pleiades Watchtower, in search of a way to restore Gluttony's victims, their relationship has gotten somewhat better, and eventually, they both became close friends with mutual respect for each other.

Roy Alphard
Julius had an ominous feeling that creeped him out when Roy kept calling him "brother". Roy is the one who ate Julius's name, erasing the memories of him from everyone he met, and ate Joshua's name and memory, thus erasing his existence from the world.

Emilia
Although their first meetings are not shown but despite being of the opposite factions, Julius holds great respect for Emilia and also admires her. In volume 4 epilogue, he says that Emilia's nature is too unprofitable, but he doesn't want that to change because that is what makes her way of living noble and beautiful as she is.