This is something that items cannot soothe.
Reiger was referring to such situations.
"Before, I didn't give you this Eldo's Tears because I was worried you would force yourself to recall that unbearable past for stronger power, pushing yourself into a desperate situation again."
"Hatred is ultimately a dangerous emotion, and anyone could lose themselves because of it."
"I don't want you to become like that, which is why I didn't give you this secret treasure."
Otherwise, Reiger would have given Ais the Eldo's Tears long ago when he returned to this world with many secret treasures.
The reason he didn't is that he feels each time [Avenger] is activated, it's like making Ais delve into deep hidden pains within her heart.
In fact, it's not just Ais; there's another person in Loki Familia who awakened a dangerous power due to past trauma.
That person is Bert.
Bert possesses a flame attribute magic.
