To write summoners well in comics, you need to focus on their powers and how they use them. Also, show their personalities through their expressions and actions. It's important to create a backstory for them to make them more relatable.
The key to writing summoners in comics is to make their summonings visually spectacular. And don't forget to build tension when they prepare to summon. Also, give them some flaws to make them more human-like.
Well, start by giving the summoners unique and distinct looks. Make their outfits and accessories stand out.