Seiichi and Saria train under Artoria to become adventurers. During their training the three of them are teleported into a dungeon by a demon’s trap.

The dungeon they find themselves in the stronghold of the Black Dragon God, the strongest member of the Demon Lord’s Army. Artoria gets separated from Seiichi and Saria in the dungeon and the giant Black Dragon God appears before her. Then that overwhelming threat attacks! Can Seiichi and Saria save her in time?!
It also glows red when their life is danger.
وتومض بلون أحمر عندما
تكون حياتهم في خطر
Außerdem, wenn ein Kamerad
in Gefahr ist, leuchten die rot.
Y si sus vidas corren peligro,
irradiará una luz roja.
Y si sus vidas corren peligro,
irradiará una luz roja.
Elle émettra une lueur rouge
si leur vie est en danger.
Inoltre brilla di rosso quando la vita
dei tuoi compagni è in pericolo.
Também fica vermelho quando
outros estiverem em perigo.
А когда их жизнь в опасности, 
он окрашивается в красный.