Ionos, the Cursed Templar
Please read the story linked above, otherwise the following will not make the most sense -Yes I did write the story
Based on the story, I want Ionos to be really slow, and therefore his passive would be along the lines of Removes 50% of bonus movement speed and gains half of that amount in armor(+100 movement speed item would give 50 move speed and 25 armor). I want the champ's ultimate to be something along the lines of Strongest Will, where Ionos tears off the armor and the passive flip-flops, granting movement speed based on armor and loosing the original effect for the duration, he would also lose health per second down to a minimum. When the duration ends, he is ripped back to the armor's position and it is forced back on him.
As far as abilities, I was thinking heavy cc when he has the armor on, and then removing the cc part when he tears off the armor and replacing it with dashes, leaps, etc.
So, in a nutshell, he would be a slow as heck tank that could stick you in one place for a long time, but do minimal damage. Then, after ripping the armor off, he becomes a super fast, agile master yi-like person who can deal a lot damage, but is slowly bleeding out because of the wounds received when he tears the armor off.
If you like this concept, please comment and up-vote! Thank you!