How does one obtain a title for the character bio? I thought it was a neat little thing to have, but I cannot find a place explaining what they are or how to get them :p

some are obtained for reaching certain points in the plotline/defeating certain enemies, for are obtained for doing certain things during fests, some are given as prizes for participation in forum games.
Some titles are just given automatically, but some are obtained as title scrolls, such as the one from the Lucky Pot scratchcard; "Title Scroll: The Fortuitous", which can then be put on the trade broker by players (as can be seen by there being a specific trade broker category for them)

they're just little kinda fun things that you can apply via your profile (via the 'change title' button) that show up under your username and level in the forums

Ah okay, understood! thank you!