Devourer (World Eaters)

Meet the most useless bodyguards in the entirety of the Great Crusade and Horus Heresy.

Devourers, those poor, poor Devourers. If you want an example of an Honour Guard more impotent and limped-dick than a Tau Ethereal Guard, than the Devourers from the World Eaters legion during the Great Crusade and Horus Heresy is a good bet to start off with.

Why are they so useless?

To put things simply. It's because Angron fucking despises them and put them as the World Eater's equivalent of cheerleaders, unlike many other praetorian guards of other Primarchs.

Angron's disdain towards his own bodyguards stem from his eternal Butthurt of failing to die with his gladiatorial family back in Nuceria. So seeing what he perceives as interlopers trying to 'mimic/replace' his compatriots filled Angron with immense RAGE. Combine this with Angron's recklessness in combat and high friendly fire incidents from the Primarch (and keep in mind that this was before the Butcher's Nails really started to fuck with his mind), and you have a bodyguard system that was less 'bodyguard' and more 'animal handler'. As such, they were only assembled when Angron went into his bloody, retarded rampages. Devourers were therefore deployed NOT to protect their Primarch, but to protect fellow World Eaters from said Primarch.

Because of the fact that they spent more time restraining Angron than they were, butchering enemies, Angron and other World Eaters like Kharn and Kargos considered the Devourers to be weak-willed pussies; being overly concerned for their Primarch who cared nothing for them. Indeed, the mightiest warriors of the World Eaters were able to best Devourers in single combat.

It is highly likely that the Devourers were dissolved post-Heresy, given how useless they were. Although a former Devourer by the name of Tarugar later formed a warband called...well...the Devourers.

Equipment

Nevertheless, despite their impotence, Devourers being honour guards and all, did wore some heavy equipment, such as Cataphractii Pattern Terminator Armour, alongside CQC weapons such as a Chain Glaive, Chain Spear or a Chainaxe.