Ongaro (d. 3978) was one of the mutants that lived beneath the ruins of St. Patrick's Cathedral in the latter half of the 40th century. He was one of the elders of the community.
A self-proclaimed pacifist, Ongaro did not believe in direct physical violence. Rather, he preferred to use his mental prowess to manipulate his foes into killing each other. Like all leaders of the mutants, Ongaro possessed the ability to project his thoughts directly into the minds of others. He could also exert control over select individuals, forcing them to commit acts of violence. Ongaro could pull abstract mental impressions from a target's mind and visually project them for others to see. His projections were always filtered through a haze of yellow light, oftentimes overlapping psychic impressions created by his fellow mutants. Of all the known mutant leaders, Ongaro appeared to harbor a great enmity towards both apes and non-mutant humans.
Ongaro was one of several mutants present at the interrogation of John Brent and the mute human, Nova. The mutants forced Brent to attack Nova, nearly choking her to death, in the hopes of getting him to reveal critical information concerning a nearby community of militant apes.
Later, Ongaro imprisoned Brent in a cell along with another human - the time lost George Taylor. He forced Taylor and Brent to fight one another, but the unexpected presence of Nova distracted the mutant long enough for the others to momentarily break free of the mind control. Taylor and Brent attacked Ongaro and Brent impaled him against the spiked bars of the cell, killing him.