I've started a project to centralize a bunch of search as you type tools in a place called dropdown.php
The default is to search character names ( Romaji and Alias )
There are several searches available to all, and a few exclusive to members.
A link to this tool can be found in the mobile menu near the bottom :
I'll likely add more search options as they come to mind. If there's one you would like added, use the Report tool to let me know. ^_^