Ren decides to challenge the Colosseum after being inspired by the epic battles between monsters. 
But Aoi's a stickler and wants to do things right before joning the fray.
And...that's how they
give monsters form.
Und… so geben sie Monstern eine Form.
Así es como le dan forma
a los monstruos.
C’est comme ça
que les monstres prennent forme.
E... é assim que eles dão forma
aos monstros.