...I was dying, and there wasn't a cure.
Denzel was sick, too. I told you about Denzel — I promised I would find a cure for him. That's how I... it didn't help, though. Then I got sick too, and I couldn't... I couldn't do it. I couldn't watch him die, and have him look at me, waiting for a cure I couldn't make, when I promised I would. And I didn't... I didn't want them watching me die. After everything we went though, and I was just going to waste away on a cot until my lungs were too full of holes to talk to them and promise more things, and all they'd be able to do would be to sit there and watch me die. I couldn't do that to them, and... and I was a coward.
...I snuck out of the house. I didn't even leave a note. Went to go die in the Wastes. Made my swords then... I wanted to have just one thing that was... that I had done. That was me. That was mine.
...
They found a cure before things advanced too bad. And I came back, and I promised I would never, ever, ever leave again...
...
I didn't say goodbye before I left. I didn't think I'd be gone that long.
MY SOUL IS DARK BUT MY HAIR IS COLORFUL — Brahian Pokémon Alchemist

...
I ran once.
MY SOUL IS DARK BUT MY HAIR IS COLORFUL — Brahian Pokémon Alchemist