
Wait. So instead of reincarnating, he killed the original Deeli's soul and took his body? How does he know that's what happened?

Yup. Since it's obvious he was born, meaning he is REINCARNATED. He can clearly remember being inside the womb, meaning the soul inside the fetus is and will always be him. But I guess that's not exactly something that he knows about. From how workaholic he is in his past life, I don't think he learned much about souls and stuff.

Does anyone know why the redhead knight is so fixated on the older sister? The way he talks about her makes her seem like the saint and the MC like a reincarnated demon king

Older sister? U mean brother right XD
I think he dosent wanna be a knight for a selfish sheltered princess. That's what he thinks. So he rather be with crown prince which is mor honorable and more action and stuff. Crown prince is in the middle of epidemic sacrificing hi health to save the people. While the girl is just pampered and protected in her castle, and don't know anything. Which isn't the truth at all. Her father literally ignore her and tried to choke her. The blind selfish idiot is the Red haired knight ヽ(`Д´)ノ
I feel like this was too short. It would have been interesting to have seen more of Ginger's conflict between choosing to be an angel or demon. There was quite an emphasis on it.in the beginning but no resolution. It would've also been nice if we met other characters who chose to stay as a mix of both