User blog comment:Vazelos3/Coby as a Captain/@comment-4904935-20130611204433

Of course Akainu remembers Coby and I am certain he is also keeping tabs on everyone else who got involved and helped Luffy at the Marineford! I doubt "Forget and Forgive" is in Akainu's nature, he is the kind who will never drift away from something he strongly believes in! I would think he does get involve in the ranking process when it comes to a certain level of promotion but we are talking about Garp's student with awakened haki here! ;D So yeah, it's possible for Coby to get promoted to a caption level.