You could do it in the loader, but it sometime forget the wiitdb.zip edition (no idea why, probably a bug).
It's more permanent to edit the wiitdb.xml, remember that you will have to fix it again if you update that file.
The issue is not the loader (partially at fault) but the Font you are using.
the loader is using "system font" by default, which doesn't have the Ō letter. so you don't see it, and the game looks like "kami".
This can't be fixed, it's just a missing Font issue.
The fault of the loader is the fact that the Ō is located after the Z in alphabetical order, because it's checking the letter's order in ASCII/UTF8 order, and not in human-readable order. This could be fixed.
To fix the title inside the loader, there are few methods :
1. disable system font, it will use a custom font (I find it ugly, but some users might prefer it).
Settings > GUI > system font : OFF
you will have to re-ajust the font size or you might have too big letters and overflowing menus.
2. Load a font of your choice using the Theme option.
3. Edit the game's title in the Title cache.
This is what seems to have a bug, and the title is sometime not remembered and revert back to the one located in Wiitdb.xml file
- Settings > GUI > Game window : rotating disc (or mixed)
- If you chose mixed, go to a layout other than the animated banner layout (List, Wall, or carrousel)
- Select your game
- Click on the game's title at the top of the rotating disc menu
- select a new game's title
- reload the loader if it doesn't take effect immediately.
If you notice other errors (real errors, not display errors in the loader) in wiitdb, then you'd better report them to gametdb website so other people will benefit from your help too
There's nothing to report for Ōkami, as this is the correct name. it's only a loader's bug.