"Harmony" (♪♪ハーモニー Hāmonī), All New In G Clan Booster 1: Academy of Divas

Today we were introduced by the new Cardfight!! Vanguard's mechanism, Harmony (♪♪ハーモニー Hāmonī). Harmony is a keyword introduced on G Clan Booster 1: Academy of Divas and the first unit that has this skill is Miracle Voice, Lauris and will be followed by supports such as Full Strength Idol, Sanya and Full Throttle Idol, Lurrie.

Miracle Voice, Lauris

[AUTO](VC/RC):Harmony (When another of your units is placed on the same column as this unit, both units are in Harmony state until end of turn)
[AUTO](VC)[1/Turn] Generation Break 2 (This ability is active if you have two or more face up G units in total on your (VC) or G zone):When this unit becomes Harmony state, choose two of your units, they get [Power]+5000 until end of turn, and this unit gets [Critical]+1 until end of turn.
[AUTO](VC):[Counter Blast (1)] During your turn, when your G unit Stride, you may pay the cost. If you do, choose one of your rear-guards, and return it to your hand. If you return a unit this way, draw a card.

 In the wikia explains that,;

• When a unit other than the unit with "Harmony" keyword is placed on your VC or RC in the same column as the unit with Harmony keyword, both units become Harmony state, and remain in Harmony state until end of that turn.
• If one of the units in Harmony state leaves the field, the other unit is no longer in Harmony state.
• Certain abilities can be used "if a unit is in Harmony state" or "when a unit becomes Harmony state". 

So the big picture is Harmony state can only be activate when the Harmony unit is with the other unit in the same column. Which Miracle Voice, Lauris can active her Generation Break 2 when there is other unit on her back rear-guard circle and one thing I can say, it is so powerful! I hope to see more Harmony units after this, until next time!