To a Mage, death in the Void Realm is much like taking a break from work, something you don't wish for, but there's nothing to be done once it happens. You can only graciously accept the bad news and ponder how to spend the unexpected vacation without clocking in at the Void Realm.
Sonia also knew that her first death wouldn't affect Professor Trozan's evaluation of her. Dying early was just bad luck, and dying late wasn't necessarily good either.
Some defeats and lessons must be personally experienced for a Mage to gain the wisdom.
But hey, everyone's been young and dreamy once—
"I might become the first immortal Mage in the history of the Void Realm."
Seeing this achievement about to be declared a failure, Sonia wasn't disheartened at all. After all, she had managed to make it to her fourth foray into the Void Realm before conceding her first death, outperforming 99% of the Mages.