Editing Avatar Menu

Balloon Letters have more benefits than simply getting Scratch Cards, however. Each Balloon Letter received can increase the avatar's {{nihongo|'''Happiness'''|ハッピ一度|Happī-do|lit. "Happy Points"}}, which ranges from 0 to 100, as long as the attached avatar shares parts with the player's avatar. Having happiness over 50, indicated by floating musical notes, increases the chances for Balloon Letters to include special icons by a factor of 2.5 and rare Scratch Cards by a factor 6 each. When it is at its highest level of 80 or above, indicated by hearts surrounding the avatar, the chance for special icons increases to 5 times the normal rate, the chances of rare Cards increases to 24 times the normal rate, and Data-Sora's own [[Luck]] is doubled; getting this boost is actually the only way to raise his Luck to its maximum of 28.

However, opening more Balloon Letters also increases the chances that the next Balloon Letter will infect your Avatar Sector with a [[System Sector#Viruses|virus]]. The probability of a letter carrying an infection is [[File:Avatar Menu formula 1.png|class=invert|link=]], where [[File:Avatar Menu formula 2.png|class=invert|link=]] is the base probability the letter is infected (1% for letters from fixed avatars, random avatars, or infected friends; 0% for letters from uninfected friends), and [[File:Avatar Menu formula 3.png|class=invert|link=]] is the number of letters that have already been opened, which resets each time a virus is received.