For the best game advantages, it is the best to invite and work together with Ally players. You can become an Ally with players from all Guilds . For each Ally you make, you will recieve a Skill point bonus. part of your daily Log In Bonus will depend on number of Allies you have, so it is best to invite as many players as possible. However the maximum number of Allies is limited, which will increase as you level up.
Note: If you lose an Ally, you will also lose Skill Points.
To invite an Ally player, input a player ID on the Ally screen to send a request. When the other player accepts your request, they will officially become your Ally.
Note: Maximum number of Allies is 100.