Kalibak is a fictional character, a deity and supervillain published by DC Comics. Created by Jack Kirby, the character first appeared in New Gods #1 (February 1971).
Kalibak is the first-born son of Darkseid and Suli. His mother Suli is killed by Desaad, acting under orders from Kalibak's grandmother Queen Heggra. Kalibak becomes a legendary warrior, and often serves as Darkseid's second-in-command. After Darkseid breaks the pact of peace with New Genesis, the rival planet of Kalibak's home Apokolips, he aids his father in the resulting battles.
Kalibak is often pitted against Orion, and after numerous clashes they learned that they were half-brothers. This fuels Kalibak's hatred of Orion to new levels, for Darkseid clearly values Orion over his first-born. Unlike Orion, Kalibak secretly craves the love of his father - something he, nor anyone else, can hope to attain - and it has been shown that he has a gentle side which is completely submerged under his brutish exterior, and he consistently and fearfully keeps hidden, for any sign of weakness is, on Apokolips, subject to the cruelest punishment.
For his part, Darkseid is more lenient towards Kalibak's failures than those of his other servants - having slain him, he always returns him to life; it is implied this is because his eldest son is the offspring of the one person Darkseid truly loved.
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Official Site: DC Comics
Links: Wikipedia Entry Kalibak Profile Spider-Bob.com