Elio's grandfather - Wolfgang Argentium, the patriarch of the Argentium family and one of the most influential people in Unova. Though, this applies to the rest of his siblings as well, who do their utmost to never let him down. The perfectionist mentality that formerly plagued all of them was rooted in wanting to live up to Wolfgang's (imaginary) expectations, even though he ultimately wanted his grandchildren to be happy and live life to the fullest.

Elio modelled his personality after his grandfather, especially in the latter's younger years - while keeping a certain level of distinction, per his desire to be his own person.