Could Trydamere have a demon inside of him?

When we look at the current demons we know they seem to align with one of the seven deadly sins. Ex. - lust. Given how little we know about demons, trydamere, and aatrox there is a possibility that the demon of wrath may have entered into the body of trydamere and allow him abilities when he gets angry. In his story it states "Tryndamere gave in fully to his wrath. His blood boiled and his anger consumed him, banishing his mortality." So was the Demon already inside of trydamere or was it implanted by aatrox? But how and why would Aatrox put the demon of wrath in a mortal from the frejlord? Demons seem to have plenty of power on their own, so why limit them by placing them in a human body? Are the darkin somehow related to demons and if so did Aatrox forcefully put the demon in trydamere? Is there a reason why Aatrox would choose trydamere to place a demon inside of. There are so many questions i have about demons as well as darkin, and this is assuming that this theory is even somewhat true.

Please leave your thoughts on this. I am searching for answers in anyway possible. :)