In a sense, blood-qi density determines the future of a vampire. Not everyone noticed this one trait when they started out but as they accumulated more blood-qi, the irregularities became apparent.
Keith was lucky to have the perfect combination of luck and execution. If the previous Keith had been a baron, the irregularities before he became a baron would still be there. Without a system to accurately guide the blood-qi, Keith's density wouldn't reach the level of what it is today.
"Does having a higher blood-qi density help with breakthroughs?" Keith asked the student council president.
"Not by much, but it makes your growth seamless, and trust me, you need it more than you think after reaching the higher levels. People who reach the King stage have everything in order otherwise it's a distant dream." Valencia replied.
"That's why you want to learn the technique and remove all irregularities from your physique," Keith said.