Disappointments
If the siblings closest to him were obnoxious and immature, Pride concluded that the newest two were useless. They were pure incarnates of their sin, and absolutely nothing else. Once Greed began leaving during the night to find company in humans, Father had been weary that giving the next few homunculi personalities would spark rebellion just as it had in Greed. Father didn't like Greed's personality so he made Sloth; Greed runs for his life after Gluttony is made for fear of being lobotomized. The homunculi wouldn't have enough brains to rebel, but it certainly encouraged Greed to.
Although Pride respected and had faith in his Father, he had to admit that from his point of view, giving all the brawn and speed to that which would only refuse to use, and use the excuse that he was too tired all the time to exert any effort. The youngest sibling, an alchemy failure turned to a homunculus, only entertained himself with his endless craving for nourishment. Pride found his younger siblings not only disgusting and repulsive, but useless to the homunculi's cause, seeing as their limited intelligence impeded performance, even with the skillset they had very graciously been bestowed.
The two now sat together against one of the walls of their underground home. Gluttony had taken a liking to Sloth, who had no cause to be rude to him unlike the rest of his siblings—with the exception of Lust—had nothing but revulsion towards his nature to share with him. So with Lust gone, Gluttony sought comfort from someone who had no disgust towards him. Sloth sat staring off into space and Gluttony gnawed on a bone.
Pride shook his head. Pride wasn't sure what it was Father planned to do with these two, but in the end he just had to trust him. He had never been wrong before—or at least had been able to make use of any mistakes—and Pride would help keep that record clean.