Bloom's worst nightmare is to become a witch and here is why.
Let's start before the show even begins.
What we see in Bloom's room
Bloom dreams of becoming not just a magical creature but a fairy. This girl draws the world she might be subconsciously remember.
SHE READS ABOUT FAIRIES. We know from Hallowinx episode that Witches are a thing in pop culture but Bloom doesn't even spare a single thought toward them. Her heart is set on becoming a fairy.
Stella: See, I told you, you could do it.
Bloom: Wow. Then I'm really a fairy.
Stella: Of course you are, I'm never wrong. S1EP1
For Bloom it's like manifesting sth into a reality.
Bloom: *Closing her eyes* Are we there yet? Can I open my eyes?
Tecna: Yes, go ahead, take a look.
Musa: You look disappointed.
Bloom: Of course I'm disappointed. This is it? Magix? Capital of the realm of Magix, most enchanted city in the universe?
Musa: Well, what did you expect?
Bloom: I don't know. Dragons, gnomes, wizards, shops full of magic wands...
Stella: But that's fairytale stuff. This is the real world. Here everything lives off its own magical energy. Magic is everywhere.S1Ep2
Bloom wanted full on fantasy maybe even sth on level with HP or sth. I do love she named dragons first <3
Griselda: Outside the realm of Magix? Utterly impossible!
Bloom: I beg you, don't send me away. I've always wanted to be a fairy with all my heart and now I can make my dream come true.
Griselda: You lied to us and that is unforgivable!
Faragonda: But, she also has a dream and she totally believes in it. She has displayed a great tenacity and isn't that a quality that every fairy should possess?
Griselda: Yes, ma'am.
Bloom after seeing witches we will see her growing distrust of them and just clear hatred towards them. Bloom doesn't trust witches and knowing it was Ancestral Witches who ruined her home planet are we even shocked?
In 3rd ep Bloom feels defeated. She doesn't see why she is in Alfea because how badly she is doing in school. It's realistic, her dream instead of being easy was hit with reality check. Magic requires concentration, repetition, learning.
Bloom was already told who attends the three schools and doesn't question the lack of witches. As far as she knows they are evil and the stunt Trix pulled only confirms her in her believes.
Icy: Hurgh. So long little fairy.
Bloom: No! I am a fairy and must not fail! I will succeed!S1EP3
Bloom's faith in herself made her transform. She doubted being a fairy but in presence of evil her light is brighter. Bloom in swamp episode is hunting down troll who worked for someone...after it attacked Stella and her.
Also Bloom calls Amaryl and ungrateful fairy XD.
Bloom: Why a school for fairies can't use magic to cook dinner?! It doesn't make sense! All you've got to do is wave the magic wand, snap your fingers, wiggle the nose a couple of times, and voilà! Everything's ready without any effort! S1EP5
i think what is worth pointing out is Icy was willing to accept the agreement which WINX FUCKNIG BROKE.
I think one of the most telling things is the race in ep 8 where Bloom accuses Trix without any proof. I know that Trix did it...by Griffin's suggestion reminder.
Trix might have gone to the festival just to enjoy life but...they were given job to do. Another one is (I blame show for this one) how no one asks Why Musa was attacked. But that's Bloom being a good friend who wanted to save her so I have nothing to add here.
Bloom: I know you're just holograms but still, you're the Trix and you don't wish me well.
Bloom: You witches! I've had it! EP10
*Icy, Darcy and Stormy laugh meanly and the contestant starts to bawl. Bloom watches from around the corner.*
Bloom: The usual suspects.ep12
They literally did nothing yet. Bloom is jumping to conclusions...rightfully saw again but no doubt given.
Bloom didn't know yet who she is but she knew being a fairy was everything to her. This is her personal hell. Also I am curious...if Mirta said she was a witch before she introduced herself with Bloom believe what she had to say?
Another golden evidence is meeting Diaspro and the fact that trix on purpose were left out of the episode.
After losing her powers Bloom believes she is useless.
Other witches? cool. Trix? FUCK THEM, IRREDEEMABLE.
Faragonda a minute earlier:
Love how the ep already spoiled its ending. But anyway Bloom is very very against trix. She actively HATES THEM.
At this point why i bother jk.
What I want to say is...Bloom hates Ancestral Witches and 100% hates Trix for being their descendants. She wishes Domino returned, her parents to be back and for her to be a full fairy hence the reason why even achieving Enchantix didn't feel like enough. It was another barrier, another obstacle. She dreamed about being a fairy and a long the series she found her purpose and felt complete in it.
Bloom first and foremost wants to be fairy, a warrior, a protector.
Not princess, not a queen not to have a love story.
She wants to be the hero people can look up to.
And with Valtor's defeat, fall of Ancestral Witches and return of Domino she got that. Bloom never looked up to royal lfe.
Bloom craves revenge against people associated with Trix, Ancestral Witches etc.
Winx wouldn't happen if Bloom weren't a fairy. She is THE FAIRY and the number one hater of trix.