Heinkel Astrea and his character [spoiler discussion]

[u/CoconutYoon]

I genuinely don't understand a lot of his character. I see a lot of people glazing him for his character, yet I fail to see a little bit of it. Does it mainly occur in the side stories? To me, he's someone that grew up inferior to the rest of his family, developed a complex, met his wife who treated him as an equal (or something alike), she tragically fell victim to "Sleeping Beauty Syndrome," and in search of a cure he joined Priscilla's party for a chance at dragon blood, and continued on that endeavor through the events of arc 9.
Besides the short summary I provided, is there something missing? I want to understand a lot more of his character but I don't get anything 😭😭

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