Mary, mother of Jesus

Mary is the first disciple. She said yes before anyone else, watched her son die, and was still in the upper room at Pentecost when the church started. Luke clearly got his infancy material from her or someone close to her — those chapters read like family memory. The later church spent centuries arguing about her titles (Theotokos, ever-virgin, immaculate) and those arguments were never really about her — they were about Christ. If Jesus is fully God and fully man from conception, then his mother carries God in her womb, and the church had to find language for that. The Magnificat is also the most politically radical hymn in scripture.