The magical girls of all the Yu-Gi-Oh series so far as sisters and witches. Yusei (5Ds) doesn't have one so I used Aki's Black Rose Witch and Yusei's Sonic Chick as the witches' familiar. From oldest sister to youngest sister:
Nova Rhiamon (Cyberse Witch/VRAINS/Top): 12th grade tech wizard. Wants to be the best witch to combine magic and tech.
Cassie Rhiamon (Dark Magician Girl/Original/Top left): 10th grade influencer/advice-giver/kind-hearted cheerleader. Uses magic for special effects on her hobbies. Used to have a crush on her teacher (Dark Magician) before he found out and turned her down as gently as he could.
Beatrix "Bee" Rhiamon (Gagaga Girl/ZEXAL/Top right): 9th grade haunted house professional. She's ready to use her magic to save those who get heart attacks from her houses. Her fashion sense is based off of her teacher's (Gagaga Magician)...who she has a secret crush on. Cassie, loving big sister, warns her from experience not to fall for someone that much older than her
Celeste Rhiamon (Seven Roads Witch/Sevens/Middle): 8th grade specialist in elemental magic to "rule the school" as the defender against bullies.
Harmony Rhiamon (Tuning Magician/ARC-V/Bottom left): 4th grade junior Youtuber (Cassie is her role model) who uses musical magic for her music videos alongside CJ.
Cassandra James "CJ" Rhiamon (Card Ejector/GX/Bottom right): 3rd grade partner to Harmony who loves snowflake designs and makes snow and ice her magical specialty. She's not allowed to use her powers to force snow days for school.
Jade Rhiamon (Black Rose Witch/5Ds/Bottom): 2nd grade gothic lolita who's quiet and uses shadow-themed magic for her sensitive-to-light eyes. The most ADORABLE bean.
And yes, they go to Spellcasters schools. Don't know who their parents should be. They disguise their wands as their pencils.