The Punishers are cyborgs in the employ of Galactus. One was used to defend Galactus' world devouring machine from the Fantastic Four who sought to destroy it. Later, Galactus also sent a Punisher to Earth to locate the exiled Silver Surfer, but the Punisher failed because of the Fantastic Four's interference and Galactus called it back; then Galactus used other means to reach his goal.
The first Punisher was later found and used by the Rigellians.
Powers and Abilities
Power Grid Intelligence 1 Strength 7 Speed 6 Durability 4 Energy Projection 4 Fighting Skills 5
In Silver Surfer v3 #109, the Punisher speaks in a supposed alien language that are translated in a footnote. The "alien language" is a transliteration of the English words to Greek alphabet (not even real Greek; just English written with Greek letters).