He is the younger brother of Scott Summers aka Cyclops. He once lead the team of X-Factors along with his partner, Polaris. His name is Alex Summers, also known as Havok. The man who unleashed ambient energy force from the cells of his body and processes it into plasma.

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Alexander Summers (Earth-616) from X-Factor Vol 1 234 001.jpg

Currently, he was in the leading team of Hellions along with Kwannon.