Well I don't know about the blue part. If their name is in pink I believe it means they are roleplaying. Blue might mean anonymous, but Im not sure on that. As far as the titles go, you have to earn them. If you want Kagimen, Hunter of N00bs, or whatever, you have to kill 500 of x creature. You can also get slayer, which is 1000? Anyways, if you want names like "The Lore Keeper" they come from doing herritage quests. Not sure how many you have to do for each title, but thats how you get them.