The answer is: Apostle

Acts 18:24-25

Apollos is one of those captivating figures in early Christianity that really highlights the diversity of roles within the early church. Although he is often regarded as a talented preacher and a profound teacher, many recognize him as a significant missionary, effectively an apostle in function, even if he wasn't one of the original twelve.

In Acts 18, we find Apollos in Ephesus, where he is described as "a learned man, with a thorough knowledge of the Scriptures." Now, this is not just any run-of-the-mill guy; Apollos was well-versed in the Jewish texts, but he only knew about John the Baptist's baptism. Imagine the fun ripple effect when Priscilla and Aquila took him under their wing to teach him about Jesus! They are essentially acting as early church mentors—this shows the collaborative spirit of the early Christians.

Furthermore, Apollos quickly became a key figure in Calming the waves of the Corinthian church’s division later on. Paul even referenced him in his letters, stating, “I planted the seed, Apollos watered it, but God made it grow.” This awesome metaphor speaks volumes about teamwork in the church and hints at a deeper truth: it's not just the role but the heart that matters. Apollos may not be considered an apostle in the traditional sense, yet his influence and contributions make him a fitting candidate for that title!