Ronan

Ronan was a member of the alien race the Kree and a terrorist. A militarist, Ronan attempted to eradicate the Xandarians by forging an alliance with the legendary Thanos, offering to receive the Orb in exchange for the destruction of Xandar. Ronan acquired the Orb as promised, but decided against giving it to Thanos, choosing to take the Orb's power for himself. He then went on to attack Xandar but was defeated and killed by the newly formed Guardians of the Galaxy.