Definitely Meg.
Actually, it wasn't me this time. I don't know enough about BoD/BoB to really speculate. Though I do think that this forum is mostly for sedes and sedewhatevers.
I do tend to lean toward BoB though. I was looking through my St. Andrew Daily Missal yesterday, reading about the various saints on their feast days, and I came across a saint who was a catechumen who was martyred before was baptized. This is from page 1072 in the St. Andrew missal:
January 23
St. Emerentiana, Virgin and Martyr
Red vestments
"A foster-sister of St. Agnes, the virgin Emerentiana, who while still a catechumen shed tears on the tomb of her friend who had just been martyred. Some Pagans mocked at her grief. She, full of the divine virtue of which Jesus is the source (Collect), reproached the idolaters with their cruelty towards Agnes, and they in their fury stoned her on that very tomb. Baptized in her own blood, she went to join for evermore her Spouse and her sister (about 304)."