Let me break this down for you, since it's actually quite an interesting story moment. When you choose to inherit the frenzied flame, you're essentially betraying everything melina stands for - this is because her whole purpose revolves around bringing controlled renewal through burning the erdtree herself. The frenzied flame path represents total chaos and destruction, which goes completely against her role as someone connected to destined death.

Here's something interesting you might not know - melina is heavily implied to be the gloam-eyed queen, which explains why she takes this betrayal so personally. When you take on the flame, you're not just rejecting her sacrifice, you're forcing her to return to her original purpose as a deliverer of death. That's why she promises to hunt you down later (and trust me, that's not an empty threat).

Even if you try to fix things later with miquella's needle, she won't come back. This is because it's not just about the power you took on - it's about the choice you made. Think about it like breaking someone's fundamental trust - even if you apologize, some things just can't be undone.

A good thing to remember is that her departure serves as a powerful reminder of the game's themes about cycles of death and rebirth. When she says you're "not fit to be called a lord," she's not just being dramatic - you've literally chosen to break the natural order she's devoted to maintaining.