Yes, in 'echo 3 true story', 'echo 3' is likely related to the 'true story'. It could be the name or identifier for the events that make up the true story.
I'm not sure specifically as there could be a variety. It might include research breakthroughs in areas like biotechnology or engineering. Maybe new academic programs being launched or achievements of the sports teams at the University of Wisconsin.
Another scary one is about the old lighthouse on the Wisconsin shore. The keeper of the lighthouse disappeared one stormy night. Ever since, there have been sightings of a figure in the lighthouse tower, and strange lights that seem to float around. It's as if the keeper's spirit is still trying to perform his duties. The howling of the wind and the isolation of the lighthouse make this story even more terrifying.
In most comic versions, Echo isn't deaf. However, there might be alternate or special story arcs where this could potentially be a trait, but it's not a common characteristic.
Sure, Echo is portrayed as deaf in the comics. This trait plays a role in shaping her personality and the challenges she faces throughout the comic series.