Sona

Sona directs a teamfight much like a conductor leads a symphony: each ability radiates an aura, and each aura is a benefit handed to her allies. Her true test is managing cooldowns, not showy mechanics. She is a Support-Mage who mostly plays support and sometimes mid, and from safety behind her front line she delivers a huge amount of steady utility.

Her three basic abilities span the whole range of team support. Hymn of Valor sends damaging bolts toward nearby foes, favoring champions, and marks allies with an aura that adds bonus on-hit damage. Aria of Perseverance restores health to Sona and one injured ally, while its aura distributes shields. Song of Celerity hastens everyone close by. Alternating between these songs forms the core of her rhythm, and Power Chord pays off that alternation directly: each successful ability cast grants permanent ability haste to her basic spells up to a limit, after which it refunds ultimate cooldown instead. The sharper she plays, the quicker she becomes.

The chord that ends fights

Crescendo is her one decisive moment: a line stun that makes enemy champions dance while they take magic damage. It serves as a fight-winning tool for engaging or countering an engage, and because of Accelerando it returns sooner the more efficiently she has played throughout the game.

Sona appeals to players who like enabling teammates and squeezing out hidden value: precisely timed heals, speed boosts for a retreating carry, an aura applied before every trade. The price is fragility. With a defense rating of 2, no dash, and short-range songs, her survival depends entirely on positioning, and any assassin that reaches her brings the performance to an abrupt close.