MELTY BLOOD: TYPE LUMINA

This is kind of rediculous, but here's what you do:
From main menu click [single play], then hover over a character. After 5 seconds they'll say something in japanese, and after 10 seconds they'll say something else. click on [Achievement] and claim 'play voice (character standby 1) and (play voice( character standy2) as well as play voice (character select) if you have it.
Repeat this for 10 characters and your achievement will pop. Pretty easy for a 2.5+ ratio achievement, but it's also a kinda crazy way to unlock it, and i'm sure i'm not alone in wasting 2,500 points buying 20 voice lines before discovering the real way to get it