Eli, my brother, good to see a post from you and I pray that you are well.
I suspect you are speaking of Saint Celine
a brief life [catholic.org]There is also a beatified religious, Blessed Marie-Celine of the Presentation of the Virgin Mary, a 19th century Poor Clare nun who died at age 19 and was beatified by HH Benedict in 2006
the biography at time of her beatification [vatican.va]Celine Martin was the given name of Sister Genevieve of the Holy Face, biological sister of St Therese of Lisieux, I believe
Many years,
Neil