Since no official mass-produced "Karen Yuzuriha" swim top exists as of this writing, fans have taken matters into their own hands:
If you’re searching for the "Karen Yuzuriha swimming top," here’s what fans and artists commonly describe: karen yuzuriha swimming top
The phrase "karen yuzuriha swimming top" likely gained traction through: Since no official mass-produced "Karen Yuzuriha" swim top