Conditional Formatting / COUNTIF

I have a workbook that logs participants to events monthly and just logging if they no-showed. I would like to keep a running roster of just the no-shows on a separate sheet within the workbook. I thought I could use COUNTIF or SUMPRODUCT, but maybe I'm not setting it up correctly. I want it to search the workbook for a name and count how many times they have an "x" in the no show column.

Is something like this possible?

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