Every awakener has to go through high-intensity combat-related situations quite often in their life while conquering dungeons and fighting powerful monsters.
In such situations, communication between allies needs to be fast, efficient, and to the point.
Thus, all students of the academy and various other battle schools are all taught the skill of communicating in sign language and code words so that they won't have to say long sentences mid-battle.
The same was obviously true for Lia too.
As a top scorer in all subjects and a top scorer in the entire class overall, Lia was perfectly capable of using code words too.
Moreover, she had established various kinds of code words according to her own unique circumstances and capabilities that would seem like useless words to others but would be very meaningful to her allies.
