With the beginning of Celica's banner, I accumulated 60 orbs, thus 3 chances to get Celica. In the first summoning, the only note-worthy unit I got was a 3-star Lon'qu and a 4-star Nowi. Lon'qu will be used for that Vantage inheritance fodder. As for Nowi, she'll be useful for the future, so I grinded her up to level 20. I got nothing noteworthy on my third summoning (except another Lon'qu, who will be inheritance fodder due to his Vantage)...
But on my second summoning, I got 4 green orbs and 1 red orb. Unfortunately, I still didn't get Celica on the one red-orb. It seemed like I had some chances to get Hector and/or Boey, and I remember thinking to myself, "I feel like I'm getting Boey." And then this happened on my last summon:
Yep, I got Boey. He is now my third 5-star green-tome user following Julia and Soren. Really wish I got Celica instead, but alas, I think he will do for now.
Boey even makes great inheritance fodder. He can learn Ignis AND Renewal. Yep, I think I'll train him up for now, but if I ever get Celica, he's probably going to be Inheritance Fodder for her so that she gets Renewal. I may like Boey as a character, but Soren already does an excellent job as a 5-star green tome user, so I don't see much use in Boey.