I took copious notes on what translations of the fanbook I could find; it may have been from D.Gray-Divinity, they seem to be pretty reliable. Then I made tables. Lots and lots of tables. Like, first and last names (official spellings) in alphabetical order, and side-by-side charts of height and weight, and nested categories of nationality/ethnicity, and this really complicated monstrosity comparing the weird 'stats' the fanbook included (what the hell does 'flexibility' even mean?), and um I'm a nerd. 8Da

The Google tells me that in general a Nyoibou is a bo staff that can extend to any length, and/or a 'double saber'(?), and that it seems to be popular among D.Gray-fans as a 'title'/name for his Innocence, whereas 'Oozuchi Kozuchi' is more what he yells during the transformation sequence when he's activating it? [/totally doesn't have a crack theory about Lavi sekritly being a magical girl, nosirree]