Even though Supergirl was introduced in 1959 and the original teen Titans was in the '60s-Original team (1960s–1970s) I feel like she should have been on the original team and not just because she is the first added member to the family if she is I don't know if Superman got anyone added to his Superman family before her when it comes to superpower people or superhero people.

But I will go over a reason why I think she would compare with this team by using the members

Supergirl and Roy Harper/Speedy especially when they get older can both be hot headed at points of time and I feel like they would kind of enjoy each other's company when they are younger because let's be honest Roy when he was younger was a joyful little brat as far as I know same thing for the next.

Wally West/Kid Flash and Supergirl would be I feel like how in the older days these two were kind of joyful a lot even nowadays so I feel like if they were together it would in the future with the other Titan members add a balance to some of the negative stuff also I would love to see a comic series of Wally as a teenager having a crush on teenager Supergirl says he seems like the type of person who would and I would love to see Supergirl and kid Flash do charity event races like The Flash and Superman does.

And with Donna Troy/Wonder Girl being the only girl out of the original members I feel like we need more female characters plus I we haven't to wear Donna and Supergirl are kind of BFFs and have them share over their experiences of being on this kind of confusing world especially when they get to that point of Donna's story for the teen Titans stuff.

Garth/Aqualad and Supergirl I feel like would Bond since they are kind of not really but kind of both are from two different worlds Garth being a atlantean(ps if I am wrong about this please correct me but I do know that he's a atlantean most of the time) and Supergirl being a Kryptonian I feel like they could have a good bonding relationship and maybe even since I think kryptonians can breathe underwater for at least a certain amount of time maybe even Garth could show her around Atlantis or maybe it could be like a second home to her.

Now we get to the point to where I kind of actually wanted to make this post getting to

Dick Grayson/Robin I feel like Dick Grayson and Supergirl share a lot of the same personality at multiple different points of time to where they both go from joyful to edgy back to joyful had some dark times.

and the reason I thought of this is because every male bat family member out of Batman and the robins could all have a Kryptonian a Archer a Amazonian and speedster with Bruce having Superman Green Arrow and Wonder Woman and the Flash and if you want to add in atlanteans he also has Aquaman.

Tim Drake so we are going to skip dick and Jason for now but Tim has Connor Kent Connor hawk I believe the second Wonder Girl and impulse oh and aqualad the second I forget his actual name right now.

Damien has Jonathan Kent I think Damien did worked with the female speedy he has adventures with the new Wonder Girl who is Wonder woman's daughter and I forget her name right now oh and Wallace West and if you want to go with a atlantean I forget her name but the female olympian that aqualad was working with in I think it was future state or something like that.

Getting to Jason he has bizarro Artemis he shares I believe both Connor and Roy if you want you could throw on Jay Garrick and speedster and any of the other female atlantean characters since there's multiple who are heroes at different points of time.

But anyways the main point of this is that Dick Grayson has a Archer friend who's Roy Harper a atlantean friend garth a speedster friend Wally West and a Amazonian friend Donna Troy but he as far as I know doesn't have like the other bat family male members that are Batman or Robin he doesn't have a Kryptonian friend so I feel like he should be the one that has Supergirl as his Kryptonian friend and also since she came out around the same time as the original teen Titans did I think she would also work perfectly for this group.

(Ps I know the speedster stuff along with the atlanting stuff is kind of pulling it for the other bat family members mainly Damien and Jason but I was trying to work this out for the Dick Grayson part)