Only tribes:Well obviously,make their parents come from the same tribe and make sure they aren't hybrids or tribrids.Like how both of both of starflights parents are pure nightwings making him a pure Nightwing.Also,if making their parents canon character,please explain who their parents met.Now moving on to the siblings.The siblings should come from the same tribe as them because they are their siblings,unless they are adopted.If you're gonna make them have an adopted sibling,please make it reasonable-like how a rainwing couple would adopt and Nightwing dragonet because it's parents left it.And this goes for all of the types on adopted siblings.

Hybrids:Okay,so their parents have to have a good explanation on how they met.Don't just make it like 'Oh so their parents met because they were in the middle of nowhere and fell in love'Just no.A good example in my opinion is 

'So their parents were a sandwing and icewing,they each came from tribes that were alliances with the other.So that means the fought on the same team in the war.Than they got eachothers back most of the time that they got married because of their strong friendship-even though icewing are supposed to be mean,her father who is an icewing changed and learnt that being kind is the most important thing rather than believing your tribe is the best.'

Good explanation on how their parents met.Sometimes,it can be like this.'So my oc's parents were a sandwing-icewing hybrid and a sandwing.While other times,it's like this:'So my oc's parents were both sandwing/icewing hybrids.'Okay,now to the siblings.Obviously their siblings have to come from the same two tribes they came from,except if adopted.*explanation in only tribes*So yeah,that's all I have for the hybrids,now onto the tribrids!!

Tribrids:okie dokie,So their parents can go a few ways,kinda similar to the hybrids-Except with one more tribe.This is the first way:'So my oc's parents were a Hivewings/beetlewing hybrid and a leafwing." Way 2:'my oc's parents were a Beetlewing/hivewing/leafwing tribrid and a hivewing.'Way 3: 'So my oc's parents came from the same three tribes,both of them tribrids.So those parents were an Leafwing/hivewing/beetlewing tribrids!'Or sometimes..Their mother may have done some cheating.. For the siblings,you know the drill.Their siblings have to come from the same three tribes as them,unless if adopted.*Explanation in only tribes!*

Byeeeee!Sorry for not updating!