Marvel: Vocal Trance

Sean Cassidy (Banshee)
He has the ability to subtly influence people's subconscious mind by changing the tones and vibrations of his voice using hypersonic suggestions and persuasive abilities

Theresa Cassidy (Siryn/Morrigan)
Siryn has the ability to subtly influence people's subconscious mind by changing the tones and vibrations of her voice using sonics, the effects tend towards blatant hypnosis. At times, she's even been capable of calming down an enraged Hulk.