After spending three years in kindergarten, attending it more or less actively, it was about time to attend the Academy for Summoners.
Only the greatest talents could enter the Imperial Academy for Summoners. It was the most exceptional place of education in the entire Lacardia Empyrean Void, and many high-ranking nobles would attend the Academy from a young age.
The average Summoner was fourteen years old upon awakening their Soul Space. However, since they entered the Imperial Academy for Summoners, it was more likely to find children around the ten to twelve.
Most students in the Academy were around the age of eight to ten when they awoke their Soul Space, and they would enter the Monster Dimension after thorough preparations in order to find the strongest possible familiar.
They would train their Mana Core a little, and only attend the Imperial Academy for Summoners once they became full-fledge Summoners.