Sometimes, a specific incident brings a name to the forefront. There may have been an arrest or a news expose in Osaka or Kobe involving a young woman named Aya engaging in Enjo Kosai. For instance, a case where a "Aya" was arrested for soliciting in Umeda, or a high-profile story about a university student in Kyoto named Aya who was found to be funding her lifestyle through "Enko." The keyword could be a "long tail" search for that specific arrest record.
Based on the terms provided, your query likely refers to a specific character or subculture trope within Japanese adult media (eroge or visual novels), specifically involving , a character typically depicted with a Kansai dialect involved in the (compensated dating) subculture. kansai enko aya