Spoilers: I'm going to stick to Basics for a while, even though they contain spoilers...
AKA: Daikenja, Muraken, The Great Sage
Age: ~15 in year 0, 22 in this picture
Looks: 5'9" (when grown), black hair and eyes, glasses
Character: Knows much, says little. Brilliant but sneaky.
Special skills: Great Sage. Clearly remembers extensive studies from all his past lives, especially the one with Shinou.
Family: Birth family back in Tokyo we've never seen. Married to Giesela von Krist (PW). Was gone for a number of stories while he got a university degree back in Tokyo. As of Epilogue, he and Giesela are back. Adopted a baby centaur, Lucy, in GoT, without consulting his wife...
In GoT, Murata's kidnapped by the ghost of Franklin von Trondheim, and forced to revisit his role in the Great Genocide - it was all his fault that the trolls and elves and nymphs and fauns and centaurs were wiped out. Those last two particularly hurt - then-Daikenja grew up among the fauns and centaurs in the region that became Gratz. Daikenja created the Shinou cult, especially the baby presentation, as a partial solution, restoring demon souls maimed in the Genocide, and saved Shinou as well in year 0. But now, he's remaining in Trondheim to fix the rest of the mess.
- Yuuri, Meet Lucy - by Jinjyaa
- Christmas card - by bananam00n