One possible fanfic could be where the fullbringers use some sort of spiritual power to brainwash Ichigo. Maybe they want to turn him against his friends in Karakura Town. They could manipulate his memories of his battles and his relationships, making him believe that his friends are actually his enemies. This would lead to some really intense fight scenes as his friends try to break the brainwashing and bring Ichigo back to his senses.
Perhaps the fullbringers are being controlled by a new, unseen enemy. This enemy wants Ichigo out of the picture, so they use the fullbringers to brainwash him. Ichigo, while brainwashed, starts to cause destruction in the Soul Society. His actions draw the attention of the Soul Reapers, who are initially unaware that he's been brainwashed. As the story progresses, some of the more perceptive Soul Reapers figure out what's going on. They then team up with Ichigo's friends from Karakura Town to find a solution. This could involve a lot of exploration of Ichigo's mind and his past relationships to find the key to breaking the brainwashing.
Mandy the cartoon girl is often shown as having a big heart and being kind to others. She's also quite smart and resourceful when it comes to solving problems.
I guess 'comic mind laser' could potentially be an imaginative concept where a character's thoughts or mental focus manifests as a laser-like force in a comic book. It might be used for both offensive and defensive purposes, depending on the story's plot.
Baby seahorse cartoons often have simple and charming storylines. They might focus on the adventures or daily life of the baby seahorses, teaching kids about friendship and kindness. The animations are usually soft and gentle to appeal to young viewers.