Kikuko

Kikuko is a Ghost-type Trainer and the third and oldest member of the Indigo Elite Four.

Kikuko is confident in battle and always looks forward to challenging a strong Trainer. In her match against Satoshi, she bade her time to observe Pikachu's movements before having her Gangar attack. Over time, she has developed an array of strategies to counter an opponent.

(Source: Bulbapedia)