Saki can detect 'Electric Pulse' or 'waves', denpa for Japanese. She states she isn't a psychic type. The 'waves' she senses are people's thoughts. It's like sensing emotions from their thoughts. She can also emit 'Poisonous Waves' at will. Think of it like a large migraine enough to bring you to your knees.
So here comes the permission....
Would you allow Saki to sense your thoughts? What are your thoughts and feelings? It can be from a particular moment or something nagging in the back of your head. Do not worry, Saki isn't the type to share a person's thought out loud. She mostly keeps it to herself.