MTL - I Made Beast-taming Widespread Across The Globe - Chapter 179 "Suicide" royal beast?

This is the story of Kir, who has to thwart the will of Heaven, Hell, and his parents in order to survive, protect the people he loves, and achieve happiness.He just has to make it through life at a magical academy, avoid dying, and survive to find his birth mother, the lost Daughter of Heaven. Or be forced to take his place at the side of his father, a Duke of Hell bent on destroying the way things are.It's a lot to handle for a quiet, brooding angel boy.Fortunately, he has company. A succubus, a foxkin girl, and a half-angel boy to start. And Kir has his own secret: this isn't his first go at life.

I was reincarnated into another world, and I’ve brought the Horadric Cube from Diablo II with me.
Being a knight is cool and all, but being a wizard is pretty neat as well.
So, which one will it be?

Seraphina spent her life as an unwanted orphan. At sixteen, the truth unraveled: she was the lost heiress of the powerful Lancaster family, stolen at birth and finally found. For the first time, she thought she’d have a home and a family.But the Lancaster mansion was colder than any orphanage, and her so-called sister made sure her life ended in silence and pain. Shunned by her new siblings and tormented by the one they called “daughter.” She was nothing but an outcast in a house of wealth and secrets.Until cancer took her life.However, death wasn’t the end.Seraphina awakens in her past, at her most broken and helpless moment. But this time, something has changed.She was stripped of her autism but still carried every scar. Seraphina tried to escape her nightmare, only to fall into the hands of a stranger with blood on his fists and secrets in his eyes.He knows her brothers. And this time, they are not letting her suffer alone.She may not believe in family anymore…But they believed in her and were ready to spoil her.

Many people wish to become a character in a novel they like. Side characters are the best ones to reincarnate as. And Ceaser was the same. However, the problem is, the person he reborn as, was supposed to die at that time when Ceaser appears in the fantasy world. The childhood friend of the main heroine, who was supposed to be a stepping stone for the main lead so she can grow stronger. However, now that Ceaser was in that person’s body, naturally, he couldn’t let himself get killed just after rebirth. But what consequences will he bring by staying alive? And what awaits near the end of this story, about which even Ceaser is unaware?