Disgaea 2: Cursed Memories/Specialists

Subdued specialists can be moved to different items.

Status Effect Modifiers
The theoretical maximum value for a resistance specialist (Aeronaut for example) is 149, which is sufficient enough to give any character in the game full resistance to the element in question.

Bonus Specialists
As a general rule of thumb, it is a good idea to subdue and collect these bonus specialists early and often. All four specialists help reduce the amount of time needed to increase your party's strength, especially once you get to the point where you can create lots of new and fancy character classes.

Collectors
Collectors are interesting, if not so useful at first. The best use for collectors is to make several items of matching rarity value, so that your character gets the rarity bonus when equipping them.

Lover Specialists
Lovers are a unique brand of specialist that auto-magically spawn on weapons that a character has used for a certain amount of time.