About My Reincarnation as Sesshomaru [Crossover]

A captain of a superpower team in the apocalypse is killed by a mutant zombie while protecting his teammates, then reincarnates as Sesshomaru and lives in a new world. 1. I want to write the thoughts I imagine Sesshomaru might have when dealing with Inuyasha, like "My foolish little brother," and so on. ￣▽￣ 2. I'd like to do crossovers with Inuyasha, Natsume's Book of Friends, Yu Yu Hakusho, Bungo Stray Dogs, Demon Slayer, Onmyoji... Whether I can actually work them in is another matter. 3. There will definitely be OOC. There are a thousand Sesshomarus in a thousand readers' eyes, and mine isn't even the original. If you can't accept it, let's part on good terms. Everyone can be happy. If you start swearing at me, I'll give it right back. 4. This is something I write to lift my spirits. I'll write when inspiration strikes, and updates will be irregular, so save it with caution. Theme: This beautiful world deserves to be lived in wholeheartedly.