Eisen/Relationships

Stark
Eisen adopted Stark when he found Stark after he fled from his hometown. Eisen loved Stark like his own son and took Stark on as his apprentice. He taught Stark all he knows about combat, including his techniques and lessons about perseverance and bravery. Eisen cooked Stark a massive Hamburg steak on his birthday every year, showing he thought of Stark as a warrior who worked hard. However, because of his awkwardness, he never conveyed the meaning of the Hamburg steaks to Stark. Eisen would also entertain Stark with his stories of his adventures. Their relationship became strained when Eisen reflexively attacked Stark during an argument as he feared Stark's strength. However, Eisen deeply regrets this, and asks Frieren to recruit Stark for her journey to Aureole.

Himmel
Eisen fought alongside Himmel to defeat the Demon King. Eisen respected Himmel as he was brave and kind.

Heiter
Heiter and Eisen were comrades who fought together. Eisen, like Frieren, thought of him as a Corrupt Priest. The two had a good friendship, and after the Hero Party parted ways, the two still frequently wrote to each other.

Frieren
As two members of long-lived races, Frieren and Eisen share a closer understanding of time than their other companions in the Hero Party. When Eisen asks Frieren why she will not take on apprentices, he is unable to completely refute her answer that taking on apprentices is meaningless as she will outlive all of them. He is also nonchalant about the long periods of time that Frieren will go without contact. In the Hero Party, the two of them are the more hot-headed ones and will often attempt to fight their way through a problem if they see the goal in sight. Eisen cares greatly for Frieren. Upon seeing her regret at not getting to know Himmel better, he and Heiter work in tandem to find the location of the notes of the Great Mage Flamme. He convinces Frieren to take his apprentice Stark as her vanguard and also convinced her to head to Aureole and meet Himmel.