You have a lot of unnecessary commas in here. A lot of minor tense problems. A good grammar beta could clean this up a bit, but it's nothing dealbreaking.
You overuse the word "individual" as Myouga describes Yash's blood.
A "youkai" is a demon. A demon's aura is "youki."
Kagome "flaunts," not "vaunts."
"Baths, showers, mint;"
!! Have him use one of the skin remedies that he'd found for Kagome!
"It was obviously gremlins."
(snork)