Siren when she was first in the mansion with Wolfie, Creator, Alpha One Team, Zib and Quaddle was struggling to try to adjust

Siren wasn't very talkative noir partake in missions in the fear of being yelled at as for missions she was terrified of messing up and being yelled at for it

Siren adjusted slowly and grew more close to Stormer than the rest of the team even Furno

Stormer was the first person to help Siren leave her room for training and to spend time around the rest of the team but she stayed around him of how bad her trust issues were

Siren finally spoke when she asked Stormer if it was okay for her to have a small snack, Stormer was both shocked and happy to hear her speak finally and said it was okay and helped her find a snack

Stormer was the first person Siren called of a nickname instead of an actual name, at that time Siren was only speaking few words to the rest of the team, of course that nickname being Papa

Stormer was dumbfound at that sudden nickname making Siren scared, she practically had wings shifted out to hug herself in fear as she shook, Stormer calmed her down by resting a hand on her head and smiling at her saying it was okay to call him that

Furno being called Momma was confused and dumbfound, the others around at the time were Surge and Breez which the two laughed at that nickname, Siren got scared at that but Furno reassured her it was okay but was curious why Momma as a nickname, Siren admitted she saw Furno more of a mother figure than a second dad figure, given her biological family Furno understood why and was happy to be a mother figure for Siren as her biological one wasn't decent

The whole team even Zib, Quaddle and Wolfie all have nicknames

Surge = Sparky(Given his electricity abilities)
Breez = Cinderella(Since she's able to talk to over four thousand programmed animals, Siren calls her that since most stereotype princesses are able to talk to animals)
Stringer = Fellow Music Buddy(Since both Siren and Stringer both love music it's fitting)
Bulk = BFG/Big Friendly Giant(Self explanatory)
Rocka = Mister Arrogant(Given when he was first created his had a high over confidence and Siren uses that nickname to bring that time up again)
Evo = Fellow Mechanic Buddy(Self explanatory since they both love the idea of inventing)
Nex = Doctor Nex(Since Nex has the most medical training and helps Siren of her injuries, which Siren started to call him that which Nex was first confused then realized why and was happy he had a nickname like the others)
Zib = Zibby(He doesn't like being called this, but hides the truth he likes having a nickname from her showing she's trusting him now)
Quaddle = Quad' & Wall-E(Self explanatory)
Wolfie = Pup Pup(Siren called her this once but didn't stay around to find out the reaction of that, first time Siren was in Little Space from her traumas starting to heal of her mental state)

Siren also has a nickname
Her nickname is actually Siren, she rather be called this than her birth name due to how her biological mother always yelled at her of the abuse and it included her full birth name
Siren has never admitted this, she's worried of their reactions due to it