Some sgt. Frog OCs [Watercolor]

Recently I saw some of my watchers, CrissyG and Cattechia made some sgt. Frog OCs. That brought me back some memories of the past in China where me and my friends RP'd as our orikeros in the anime's scenario. Oh the memories, it has been almost 7 years and finally, with my drawing skill now up to scratch, I am putting my own sgt. OCs onto paper:

Who are they?
These three are me and my friend's fan canon explanation as to why Keroro (the MC of the anime) failed to conquer Earth for 400~ episodes. To put it simply, our OCs have been acting in the background as a group of rouge Keronian unit, making sure Keroro never succeed in conquering earth. Though most of the time it was his own doing, we did manage to curb him when he came close, such as disguising as one of their character, setting off explosion in the back ground, and place Banana peels in the right location (that was an inside joke).

Starring (from top to bottom, they are all male of the keronian specie FYI)

SALALA 
Calm and calculated, SALALA was once the most famous general of the Keronian army. Conquered numerous star systems and have since gotten bored of winning all the time. He broke off from the army after retiring, severing all tides and formed a small insurgent cell of his own. With the task to wage asymmetrical warfare against numerous alien threats too terrible for the minds of mere mortals. With the base set up on Earth, SALALA is the brain of the operation, his right arm is replaced by an Anti-matter projector and kept his ceremonial blade just in case for close quarter situation.

SATATA
The nephew of SALALA who lived on a mining colony until one day Angol Mois came along and destroyed his home because it was fun. Vowing ever since to kill Mois for the death of his family (I never said my OCs had happy back story), SATATA followed her trail all the way to earth. He is equipped with a large combat knife, said to be built from a piece of the debris that was the mining colony he once lived on and also carries a set of beam machine pistols. SATATA is the most unrelenting of the group and was always eager to damage Mois when the opportunity presents itself. Can he make a god(dess) bleed?

SALULU
An artificial Keronian built for boarding action, SALULU is just as merciless as any other of his vat grown brethren. Armed with a heat sword, designed to cut through ship hull and have a layer of metal skin so he can survive even in the vacuum of space. He is also complimented by three cybernetic tendrils that can be used to stun enemies as well as move in zero G environment.