Baby/Orphan Branch Availability

[Kyaria]

I was wondering this: What types of Class Skills can an Orphan/Baby character use?

Some friends & I just tried these characters, and ran into some issues. Apparently those characters can go into the classes of Swordsman and Mage (and possibly the other main branches, such as Archer, Merchant, Thief, and Acolyte).

However, when we tried Gunslinger and Ninja, the character was rejected, and not even allowed to start the quest to gain those skills.

Is there a different quest for the orphan characters? Or are they barred from these branches of skills? Is there a chance for this to change?

We checked Ratemyserver, and the heRO Forum, but didn't find this question already listed. I am fairly new to the game, so don't have a broad background of experience to draw from (on inherent flaws or failures these baby/orphan characters might have as compared to the adult characters).

Thanks for any pointers, answers or general suggestions.