Connection

After the portal incident Adora begins to doubt her ability to save and help people having failed to save Angella from her sacrifice. She also began to start having dreams about her past. Specifically Catra.

Catra begins to look back on her actions as she still felt she would do whatever to takes to get Adora after all this time but also thought about how she might've killed everyone. She also begins having similar dream to Adora.

Seems they have a connection of sorts. More than one kind of connection however.