My Unit (マイユニット, Mai yunitto) is a keyword introduced in BSC18. Spirits with My Unit can activate their effects by placing X Spirits in the "Diva" family beside them, where X is the number of Spirits needed to be aligned.
The effect has the following text:
My Unit: X (When Attacks) By arranging X refreshed "Diva" family Spirit(s) you control on the left/right/both side(s) of this Spirit, [additional effects].
The latter effect of My Unit varies between Spirits. Only the Divas have this keyword. Since BSC31, My Unit also targets the "Private Wear" family. After the Imagine Braves were introduced, there are also more rules added to My Unit. Please check the Q&A section of My Unit for more details.
While My Unit requires some set-ups, some of them can perform a fairly more powerful effect than normal Divas can do. Furthermore, there are also Divas who can apply additional effects to the attacker when they are used to align for My Unit. My Unit is one of the keywords that allows the player to create several combos in one attack.
A disadvantage of My Unit is that Spirits can be easily destroyed before the player can summon the main card out. Since Diva cards can be fairly high cost, it becomes very hard for the player to summon all the Spirits in one turn. Protection is needed when using a deck around My Unit.