JJ Thomson

Joseph John Thomson and George Paget Thomson are duo-spirits which can be both summoned as Commanders and Mage.

History
Commander's True Name is Sir JJ Thomson  but his son,  George Paget Thomson interrupted the summon and pretends they were JJ. George pretends that they don't know the actual origin of the voice of the old man surrounding them. George soon revealed that they were the cloud's son. They are later revealed to be George Paget Thomson, the fellow Knight who revealed the electrons' theory and JJ was the cloud which surrounds around George. In battles, JJ is seen commanding one's son.