Reinhard van Astrea/Relationships

Wilhelm van Astrea
Wilhelm's relationship with his grandson is very tense, likely because Reinhard inherited his wife's power as the sword saint just before she died, making her much weaker than she was at her prime. Nevertheless, Wilhelm did want to fix their relationship after the Hakugei was successfully killed. However, after Reinhard was forced to kill Thearesia's resurrected corpse, Wilhelm asked his grandson if he had any regret doing so. After hearing Reinhard's answer, he begins calling the current Sword Saint by his full name, showing that he sees him now as a stranger rather than his grandson.

Natsuki Subaru
Subaru sees Reinhard as a reliable friend, even bragging to the Witch of Sins that he personally knows the current Sword Saint.

Felt
Reinhard thinks terribly fondly of Felt. Certainly, it's because her values are so far outside of Reinhard's imagination, and he never gets tired of watching her. He is also willing to give everything to make Felt the 42th King of Lugnica as far it's within his power. To him, Felt is probably one of the ones he's spoken with most in his life. Due to how long they've know each other, she loses to his uncle and aunt, but she'll probably pull ahead during the royal selection. Somehow or other he gets along well with Felt, and Reinhard enjoys Felt's responses.