Just as human-spawned Xenomorphs are physcially superior to their hosts, Predaliens are typically physically stronger than Yautja and it would require a highly experienced and well armed Yautja to be able to stand a chance. Warrior-type is the most common variant of the caste. Two variants of the caste has been introduced so far more common Warrior-type and Praetorian-type. In fact, during normal circumstances, a Queen would seek to infest any Yautja who dare to enter her territory with any means necessary as Predaliens' presence in her disposal would give her hive an advantage over such race, furthering the enmity between both races. Whereas Yautjas perceived Predaliens as the affront upon their kind, Xenomorph Queens valued the caste as among best defenders of her hive. They also possess greater resistance to fire, giving them better advantage against enemies with heat-based weaponry than other castes. In addition of paler skin color than most other Xenomorphs, they stand taller than humans and Yautjas alike as well as possess greater physical strength than both aforementioned species.

Though appearance of known iterations vary, they displayed common traits derived from the host species more robust and less skeletal than Warrior/Drone caste, dreadlock-like appendages on the head, less elongated skull, similar mandibles around the mouth, more barbed flail-like spear tail, and ability to produce similar vocalizations to the Yautjas. Predalien is a rare and unique caste as the result of Facehuggers infested Yautjas.

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