Although your character's age will increase by one year every Lusternian year, this is largely just a method by which you may judge how long ago a character was born. Age has no negative effects whatsoever, either on your character's health or appearance. Some people choose to RP getting older and use their age as a sign of that, this is acceptable as well. Just another example of why life in Lusternia is better than so-called "real life"!