There might be a case where a small business owner had unknowingly been sold PPI along with a business loan. When Lloyds TSB reviewed the case, they realized it was a mis - sale. As a result, not only did they refund the PPI premiums, but they also offered the business owner some favorable terms on future lending as a gesture of goodwill. The business owner was then able to expand their business with the extra funds and better loan terms.
Toge Inumaki is important too. His special cursed speech ability makes him stand out. Also, the principal of the school, Masamichi Yaga, is likely to be important as he is in a position of authority and has an influence on Gojo and the other students. There could be other characters like the members of different clans that also play roles in the complex web of the story.
There was a family who had a joint credit card with Lloyds TSB and PPI was sold to them. One of the family members became ill and they thought they could claim on the PPI. But they found out there were many exclusions in the policy that they were not aware of when it was sold. They filed a complaint with Lloyds TSB. Lloyds TSB looked into the matter and found that the PPI was mis - sold as the terms were not clearly explained to the family. So, they refunded the PPI premiums. The family used the money to pay for some of the medical bills that were not covered by their regular health insurance.