Arknights, but keeping Terra in captivity

Synopsis

"If the Earth were shrunk to the size of a glass marble with a diameter of 1 cm, the Sun would be about 117 meters away from the marble, a sphere with a diameter of about 1.09 meters. Coincidentally, it would fit perfectly in my living room."Solar system model, a very common popular science teaching material.Chen Ran was very sure that he just turned his head, but how did the solar system model come to life?"Terra? Terra is written on this planet model?"Which Terra?"Planet native detected: Skadi..."Oh, it’s this Terra, from Arknights, right?And there's Skadi, the little killer whale."Skadi is leading the Sea Si herd in an attempt to break through the Star Pod."A translucent pop-up window flashed for a few seconds, completing the following paragraph.Chen Ran: “?”Can you wait for me?Which Skadi is this?Which world line is this Terra from?