I am Marvin.
Not "My name is Marvin".
There was a significant difference between the two answers.
When that sentence came out, Kui immediately fell silent.
She obviously knew who Marvin was.
In fact, as long as someone was paying some modicum of attention to Feinan, they would know of that famous name, Marvin.
The impressive feat of killing Dark Phoenix dozens of times to prevent her from ascending to Godhood was enough to shock anyone.
Not to mention all the other incredible things he did.
The name Marvin had already spread throughout Feinan and even beyond.
After the Great Elven King and the rest of the Plane Guardians left, the name Marvin represented the peak power of Feinan.
To everyone, there was only one Marvin in this world of any significance.
White River Valley's Marvin.
Thus, Marvin answered in this way.
The Dark Elf understood.