– The half-ghoul probably started their friendship. They were determined to reach this person who for 20 years was a full human, but is now a full ghoul.
– Seidou freaked out when he realized he had feelings. He was good at denial, until his S/O one day just told him to kiss them.
– His S/O is really good at reassuring Seidou that they love him, his appearance, and that they believe in him.
– Seidou envies their ability to keep eating human food. At first they were hesitant to eat anything but flesh around him, but he insists. Because if he could still choose to eat human food, he absolutely would.
– His S/O has to hold him when his flashbacks and memories of Aogiri get too strong.
– They were primarily the catalyst for him seeking out Hakatori. They’re determined to help him atone by saving as many suffering people – both ghouls and humans – as they can.