I like haikus! I may be the only one who does like them in this site, but still!
I think that too many weak words are used in this. Like ashes... ashes imply something that is gray and dusty. Perhaps you're thinking of embers? And brightly is such a typical word of fire... I would go for something a little more bolder.
The middle line...don't use memorable. It doesn't mean anything. It seems like you're only trying to go for syllable count. So, instead of memorable, think of other words that indirectly link up with fire.
Yeah... hope that helped!
Ubi caritas est vera, Deus ibi est.
"The mark of your ignorance is the depth of your belief in injustice and tragedy. What the caterpillar calls the end of the world, the Master calls the butterfly." ~ Richard Bach
"A good plot is like a dream.If you dont write down your dream on paper the moment you wake up,the chances are you'll forget it and it'll be gone forever"-Roald Dalh.
'This must be Thursday,' said Arthur to himself, sinking low over his beer. 'I never could get the hang of Thursdays.' — Douglas Adams, The Hitchhiker's Guide to the Galaxy