So this basically turned into an essay even though I mostly avoided things others have mentioned already. I apologize.
To begin with, and something no one else has addressed yet: The whole opening part is pointless. The broom, the sweeping, the unseen mother. 'Begin as close to the end as possible.'
That opening doesn't do that at all. The first interesting thing we read is 'I've been coming here to study X creature for days'. Maybe mention aching muscles from sweeping, but that should be told, not shown.
Two, don't mention her hair coming undone unless it's going to be plot-relevant, like obscuring her vision and causing her to trip. It's pointless. (There's so much pointless fluff that can be culled from this to tighten it up.) While mentioning that she's been here specifically to watch the creature, how about giving us a general description of it? Is it four-footed? Bipedal? Does it have scales or fur? Vaguely feline, or is it dragon-shaped? Remind the character of a hunting cat in its grace, or a hunting dog in its determination? Like a bear in its temper at attacking a human in its territory?
We get none of that, just that 'it's a flash' and then chasing her and we have nothing but a big black spot in our mind's eye.
The creature hisses, making my recoil.
This needs run through Grammarly, Spellcheck, and then put in a different font, upsized, and reread by YOU to catch the baseline errors.
Prologues are meant to be short and sweet and give the reader information that couldn't be gleaned from the main storyline because it happens too early or too far away or too inconveniently, they're not just a Chapter Zero.
I see no reason for this to be a prologue instead of Chapter 1.
The creature lets out a sigh, giving me chills.
- This is the creature's action, but put after her speech instead of before the creature's speech on the next line.
- Gives her chills of what? Cold-weather chills since the air-temperature apparently drops around this thing? Fear-chills? We don't know.
"I will only tell you my name is a curse," it says.
[Personal aside, both I and my characters are unrepentant smartasses and all I can hear is Leo in the back of my mind going, "Good! All the information I need. From now on I'm calling you Fuck."]
Why is this 'high, greatest being' answering questions from an impertinent human child? Why does it seem discombobulated or out-of-sorts at all? Or is this a hint that it isn't so great? Because that would be decent foreshadowing.
Where I stand I am finally able to get a good look at the Aram
YOU'VE BEEN SPECIFICALLY OUT HERE WATCHING THIS THING FOR DAYS.
You repeatedly have one character's actions on the line where another character speaks.
https://www.fanfiction.net/topic/11834/21887406/1/Writing-Guide-Part-One-Grammar
my backyard
What time period is this? Because that is a very specific and modern terminology which is especially confusing because the opening gives the impression of a tavern wench.
Research when to write out numbers and when to use numerals. Make sure you have a good grasp on it.
My heart aches without the presence of the Aram
Why? It insulted you and demeaned you and you were actively offended by what it said.
Why were you in the forest; nothing good comes of it
Question asked without a question mark.
"Your brother, Taku, is home from school."
Unless the main character has more than one brother, this isn't how somebody would talk about someone they both know, they'd just say 'your brother' or just the brother's name. This smacks of 'As You Know, Bob'
http://tvtropes.org/pmwiki/pmwiki.php/Main/AsYouKnow
Mother says as she gathers kindling
SERIOUSLY WHAT TIME PERIOD ARE WE IN?
The 'prologue' (chapter) should end when the main character gets home or when she's sent in to wash vegetables. Reader-fatigue is setting in and we haven't been given a break to think about the huge revelation of talking super-creature. We've had set-up, rising action, confrontation, denouement (with the mother hugging\scolding) and it feels like it's severely dragging out at this point.
"Taku is allowed to whoever he wishes."
Allowed to WHAT whoever he wishes?
Into my fate.
This makes the previous encounter with the beast make no sense. You could have her out in the forest for two hours looking for it and still have the exact same confrontation with her parents. I would suggest making the encounter with the beast into the second chapter. (Surprise! There ARE beasts in the woods, but they're intelligent! That makes for a good reversal of expectations.)
Overall: It needs a lot of work. It's very much a first draft, though the bones of the plot are there. The world seems interesting, the execution is just very raw.