About those names and ages, maybe there's something i still don't get, but why they didn't just ask Miura those informations? I'm sure he wouldn't have hesitated to provide them with more correct informations, since it was a guidebook about his own manga that was to be published. The fact that some of the names have a transliteration different from the official ones pretty much confirm they didn't even bother to ask him. It baffles me, really.
I think it's an indication of just how disorganized the process for creating this thing probably was. The trouble is, we don't know whether they asked for his input or not, or whether these numbers ARE his input. All we know is that it's not consistent.
Any japanese expert knows if some precious informations are reported there? (though judging by the blunders on the characters stats i somewhat doubt it
)
You shouldn't expect any shocking information in the guidebook. It's just not the proper place to disclose revelations. Those are for the story itself. This is a recap of what we already know all wedged into one place. Anyway, I'm no expert, but a few weeks ago, out of curiosity, I did look at the God Hand pages and try my unskilled hand at a rough estimation of what's said. I focused on those big blocks of kanji, which as it turns out, describe the powers each God Hand have demonstrated. But it's uh... not very authoritative or complete. And please don't hold my feet to the fire on the exact wording here. I'm not a translator, just someone who can run kanji through some basic dictionaries.
Void: Bending time and space
Ubik: Peer through time and space
Conrad: Reshape the earth* (probably not the best word. It refers to him raising the altar, and growing from the faces at the Eclipse.)
Slan: Use wings as both offense and defense (fucking seriously, that's all they could come up with?)
Femto: They use four kanji that reference grabbing something from a distance, akin to telekinesis ... which isn't completely accurate for how his power works