[n0m@n]

Sorry Tank=Rook. In the novel they use both terms often.
The novel hasnt revealed the Kings attributes yet.
Also since illya is angel she dosent fight in the Rating Game. Its said that devils may live upto 10000 years.

Spoiler for isei lifespan:

He went through lot of battles and used up lot of his lifespan which reduced his lifespan to 100 years. Though its still longer than normal human.