As of version 1.7.0, ally and summoner support were added to the game. These features emulate the support feature of the regular series in which units that battle alongside each other foster a relationship together and boost each others' stats when near each other.
After reading this notification, I immediately made Camilla my summoner support unit. However, after using her to battle, I didn't see any sort of experience or progress meter towards her next support rank, which is in line with the main series. However, being that this is Fire Emblem Heroes, I'm wondering if the criteria is any different for ranking up.
How many battles (roughly) need to be won with a support unit to increase their support rank? Is there a difference between summoner support and ally support or are they the same?