This one is for some good fun!
The Lunatics are a crazed bunch of marines, daemons and humans of various styles of worship, but the majority worship Nurgle.
With a preference for walking (partly to infect the ground better, and also because they don't like being cramped up in transports for more than a few minutes at a time), these nutjobs use the seemingly useless strategy of "Marine Spam", wherein the majority of their army consists of foot-slogging troopers.
The Lunatics are led by the Chaos Lord Tol'Gath, a chaos lord of Nurgle, who wears power armour and likes to get his hands dirty by fighting with a pair of lightning claws.
Mad as a march hare, Tol'Gath just wants to spread the love of Nurgle, and insists on giving his loyalist brothers "hugs", which often result in a rather unfortunate case of lighting claw to the head.
Tol'Gath parties with six terminator-armour wearing marines of his choice, all of whom are in service of Nurgle, and all of them fun-loving heretics.
They are as follows:
Gollup - Possesses a strange love of a powerfist, sometimes attempting to do a double-fist-punch using his fist, and the power fist of "Kablammo". This of course causes arguments, not least of which being the fact that Kablammo is often trying to use it at the same time.
Kablammo - Autocannon-wielding trigger-happy terminator. Thinking that reloading with a powerfist is easier than with his bare hands has resulted in his current name, as it often involves detonating either his ammo, or his own armour.
Mud - Wields a powersword, and finds amusement in proctology jokes. Some think this may have something to do with once managing to cut the bum-plate off of Marneus Calgar's personal armour.
Risus - Risus finds everything funny, and he can't stop laughing. Due to the infectious nature of both madness and laughter, this often causes the entire squad to burst into giggling fits over the smallest of things. On the flipside, this turns out to be quite scary for humans, and has even unnerved a few space marines in his time.
Gob and Bog - Twins. One of them likes to play with their food, the other likes their food to play with them. Impossible to tell apart, these two have been tag-teaming since before the Horus Heresy, and seem to have rehearsed an elaborate two-man roleplay for almost any situation. Much to the amusement of the other marines in the warband, these guys have had Ghazkhull chase them half-way across an entire planet, just to take him "the long way" to a minefield, where they blew up his favorite ride. In addition to this, they've led several Imperial Guard regiments, and two entire space marine chapters on a wild-goose-chase around the eye of terror, culminating in getting them to fire at where Gob and Bog's battle barge was supposed to be, having all the shots pass straight through the section of space, and into eachother's fleets, causing the loss of nearly two-dozen imperial ships, full of marines and guardsmen.
