I think Emma would make a good Tecna. She has a lot of experience as intelligent characters, and I prefer Tecna with a British accent.

I'm finally getting around to explaining these casting choices.

Bella Thorne as Bloom: Let's face it, this isn't going to be an easy character to play because of how horribly written she is. However, I feel that Bella can bring some spunk and fire to the role that the voice actress in the 4Kids version had while still making it her own. She's not only gorgeous, but she's also an amazingly talented actress and I will FIGHT anyone who says otherwise. She is really amazing at emotional scenes, which will work for those scenes where Bloom gets emotional about the fact that her birth parents and her entire planet are all dead. She's also played a good number of villainesses, which will come in handy when she has to be Dark Bloom. Plus, she's a REAL redhead and so few live-action redheaded characters are played by natural redheads. I know Bella has said her real natural hair color is blonde but I've seen pictures of her as a child and her hair is NOT blonde. It's not as red as the shade she's known for but she is a redhead. Here's a link to her amazing acting if y'all either don't think she can act or have just never seen her act.

link

Peyton List as Stella: She plays the spoiled, superficial, and shallow blonde girl really well, as she's proven in Jessie and Bunk'd (Terrible shows, though). She's perfect for Stella because she's pretty much played Stella before. Her voice can even be a bit shrill like Stella's 4Kids voice, which suits the character.

Kayla Maisonet as Flora: She's a great actress, is Hispanic, beautiful, and has a sweet-sounding speaking voice that really suits Flora.

Lana Condor as Musa: While I know nothing of her singing abilities, they can always dub her with a professional singer if she can't sing. She's a talented actress that is also trained in dancing, which goes with Musa's love of music. She has a voice that can totally be a hipster type of voice like Musa had in 4Kids. She'd be able to bring that streetsmart quality that Musa has.

Emma Watson as Techna: As sunnyfields pointed out, Emma is really experienced at playing intelligent characters. Not only that but characters that aren't really good at social interactions because of how they focus on the intellectual side of life and don't know how to have fun, particularly her role as Hermione. Plus, I prefer Techna with a British accent, so get a real British actress to play her. Not to mention that I think Emma actually looks better with a pixie cut.

Pepi Sonuga as Layla (YES, I'm calling her Layla and NOT Aisha): First of all, she pretty much looks exactly like her. She has the right voice that sounds strong, spunky (Though not so much so that she sounds like the loud, sassy black female stereotype), and not too girly but can also sound caring and tender. She's an amazing actress and has actually been on a show with Bella before in a show that was UNFAIRLY canceled, Famous in Love. Plus, she can dance and Layla is known for her dancing abilities. Plus, she's just so underrated and deserves more attention for her talent and beauty.

Pepi too.

Lana