Theory:Echo DeMille

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The following fan theories are about Echo DeMille.

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Theories

Theory	Citations	Notes
The agent with the ability to absorb sound is actually Echo's twin brother.	None.	+ We have already seen that twins may have opposing abilities: Maya can infect people with a poison while Alejandro can heal this poison. It makes sense that Echo can produce sounds while the agent can nullify sounds. - They don't look alike. • Twins do not have to look alike. - They are of different ethnicities. • Fraternal twins can appear to be from different ethnicities. - He would have recognized a sibling.
Angela and Echo knew each other from before the events of Going Postal.	Angela meets Echo in Going Postal, Part 3.	+ Angela says to Echo "You always were the mouthy one", which suggests that they had some sort of relationship in the past. + The Haitian could've erased the encounter from Echo's memory, he has links to Angela Petrelli. • Being gagged, he couldn't say anything that could give any light about this question. + The company monitors evolved human activity and is quite possible that Echo has a parent or family member who also possess abilities.
His name has a greater meaning than mere coincidence. Someone might know what power he would have before it manifested.	When Angela meets Echo in Going Postal, Part 3, she repeats "Echo" three times.	+ He has a power that has connotations of his name, Echo. + The Company monitors evolved human activity and is quite possible that Echo has a parent or family member who also possesses abilities.
Echo is Charles Deveaux's son.	None.	+ Angela seems to know who Echo is, as she says "welcome home". This could mean welcome back to the Company, as his father is a founder, therefore it is like a second home.
Echo is related to Jesse Murphy.	None.	+ Echo and Jesse have the same ability. + Echo is listed (through his assignment tracker profile) as having a younger brother named Jesse who "...joined the military as well [like Echo's older brother] but was discharged during boot camp and was soon picked up the first of what would be a long series of misdemeanor and felony arrests". - Jesse's Assignment Tracker profile states 'Jesse's adolescent years were marked by a variety of misdemeanor arrests ranging from petty theft to drug dealing and street brawling' and 'By the age of sixteen Jesse left home permanently, finding work as a runner in the Las Vegas casino circuit'. Seeing as he's busy through out his early life, he wouldn't be able to take up army boot camp. • Maybe he didn't go of his own free will. - Also Jesse's profile says he only has his mother and sister for family, no mention of a brother. + Their profiles don't exclude them from being related in some other way. Perhaps they are half-brothers. + Both Echo's brother Jesse and Jesse Murphy were picked up for "misdemeanor arrests".
Echo is not dead.	None.	+ There was not much blood, it may of been his vocal cords that were slit. - Even if he didn't die by having this throat slit, the building still exploded with Meredith in it, it would take a lot of effort to get up with a cut throat and run out of the building before it exploded. + It does seam pointless to make web shows about a charter, only to give him 20 seconds of screen time, half of it being a copse. + He just wants a normal life, this could be used well in Volume 4. + Danny Pine could of saved him, the paired off at the start they could be friends. + Only Danny Pines arm is seen, he could still be alive, in bad shape, but alive.