So... Any opinions and/or headcanons on Tsuhara? Also, can you tell us more about Kinji and his (or her?) lovely daughter Kira?
I have a story that connects them
I created Kira to fit in the backstory, she was born out of a church alliance between the biggest members, Kinji's family and a second unnamed family. Understandably, the marriage lasted less than a year, because you cannot force things, and you can expect a pair of kids to know how to raise a baby, so she ditched the church and moved away leaving Kinji to raise the baby.
He raised Kira along with all the orphans, and developed his skills as a high end priest, always putting a moment of his time to care for Kira. Then the killing game happens
Kira survives the massacre in the orphanage, she and her grandparents are the only survivors and find refugee in Towa city, but she gets taken and placed as a kuma kid, Kira has a well trained survival instinct and will play along if it guarantees her living another day. Nagisa, is the one that sets her free along with some other children so now, Kira roams around surviving day by day until she can find the person her dad entrusted her to find, in case of emergencies.
Kinji knows the world is uncertain and can't always be trusted, but he trust someone more than others and that's Tsurugi, he told Kira if anything ever happened that cause them to separate, or he can't find her, to go find Tsurugi as he will probably be able to keep her safe until they reunite. This being a silly hypothetical promise, never thinking it would be so important later on. Kira spent years searching for him and when the killing game ended, and the survivors got out, she met up with the victim's families, and went with Tsurugi.
Her current canon state, following the game's timeline is next to him, as a "daughter" who takes care of him when needed and gives him company, not fully understanding what's going on around her but she knows things aren't doing well, but nobody tells her exactly what is it, because she's just a kid and they wanna keep that innocence safe. Tsurugi protects her like a guardian dog, as it's the one thing he knows is good, 100% good.
I have a few sketches and designs done, I'll try to get them together and share them later on