Extra Gain

Extra Gain is a system that lets certain characters gain power from others. It was introduced in Disgaea: Hour of Darkness, and reappeared only in Disgaea 2: Cursed Memories and Disgaea D2: A Brighter Darkness.

Description
In games with the Extra Gain system when a character creates another one through the Dark Assembly, they become the Master of the created character (the Student).

This relationship is set permanently in the first 2 games, though Disgaea D2: A Brighter Darkness lets you manually adjust them.

This system allows for the Master to obtain power from their Students (contrary to what the name might suggest), gaining increased stats and learning spells from them.

Note that the terms used for the characters are different depending on the game:


 * In Disgaea: Hour of Darkness, the creator is named the "Mentor" and the created character the "Pupil."
 * In Disgaea 2: Cursed Memories, the creator is named the "Master" and the created character the "Student".
 * In Disgaea D2: A Brighter Darkness, creators are still "Master" and the created character the "Apprentice."

Statistics Boost
When a Master has Students, the Master will receive a bonus to each of their stats equal to 10% of the highest base stat (equipment is ignored) amongst all their students.

For example, if Adell has these three students:

In this scenario, Adell would receive a bonus to ATK of 10 from student 1, INT of 10 from student 2, and HIT of 10 from student 3.

Club Leaders in Disgaea 3 and Evil Symbol Leaders in Disgaea 4 also benefit from this stat boost, with the other Club/Symbol members taking the place of students.

Learning Spells
While a Master stands adjacent to one of their Students, the Master can use any of the Spells the Student knows, although the spells will be at level 0. If they cast a spell enough times for it to reach level 1 it'll be completely learned, letting them use it permanently without the help of the Student.

In Disgaea D2, the Student is able to learn spells from the Master as well.

Extra Gain on the Map in 4th game
This is done by grouping people on the map, the leader gets a bonus.