All that can presently (December 2022) be gleaned about Claire Mersereau from sheet music covers and by Internet searching is that she was presumably an American actress/singer who has been featured on just one work namely It Seems Like Ages and Ages and You've Only Been Gone a Day (1920) words & music by James Kendis, co-author James Brockman, and published by Kendis-Brockman Music Co. Inc,
Her portrait on the left is taken from that same work.
Surfers are welcome to contribute any further information about this performer.