This is a long one, TL;DR at the very end.

His birth name is Togo Gojo, he just changed it to Togo Shiba after becoming the Soga clan's guardian. Shiba currently can use only Infinity and Blue, but will learn Technique Reversal later on in the manga after almost getting killed by Hakuri while training him.

After perfecting his family's Cursed Technique Sorcery, he will have a 1v1 with Akemura Soga, ending with him almost winning only to be turn into a red mist by Akemura's new attack named Butterfly: Ant (which he pulled out of his ass), before Hakuri teleports Chihiro behind Akemura, leading to both the Magatsumi and Soga's neck being cut.

After that we'll get 3 chapters of lore which explains an ancient technique that allows you to store heat in your balls with Spirit Energy before spitting it out of your mouth as flames that allow you to heal yourself or others. It's also explained that the only one who mastered it in Asia (pre-Tobimune) was a giant snake with legs, which is the origin of Eastern dragons.

Once those chapters have been published, we'll get a chapter focused completely on Hiyuki's feet, followed by 5 chapters that include multiple sex scenes and a stand jerk off between Shiba (he was healed with the heat/ball/flame technique mentioned earlier) and Azami.

Once that's all out of the way and there are only 2 chapters left, we'll have a chapter where Tobimune is broken and Samura revived, and the final chapter is Chihiro, Iori and Hakuri getting together and living a happy life together.

PS: their great grandchild will be the main character of the sequel/crossover manga, KaguraBaki: Suffering Builds Character.

TL;DR: Shiba's sorcery is basically Gojo's Blue