Alex

 is the name of the specimen box owned by CARSC and the Cellien caused by it.

= Overview = This specimen box was owned by Calenda and was used to bring the Cellien back to its home country. However, CARSC lost sight of it when it was transformed into Cellien, leading to the attack on. This Cellien is also the last boss that JSRT has been chasing throughout Season 1.

= History = Alex Cellien is the result of the fusion of the Cellium, Sandstar, and specimen box "Alex" that Calenda had collected before the main story began. Soon after he was born, he ran away from Calenda and tried to attack Mirai, who was in the An'in Region. However, he succeeds in taking away Serval's Sparkle and memory as Serval takes a stand and defends Mirai. The giant Alex, in search of more Sparkle, targets an in the Kyōshū Region and succeeds in stealing its Sparkle and memory. After passing through the waters of the Riukiu Region, this time taking the memory and Sparkle of the PIP's in the Nakabe Region, he dive into the Odyssey of the Sankai Region. He attempted to attack in the Odyssey, but Oinari-sama ran out of power and fled from the Odyssey. After fleeing from the Odyssey he was not seen for some time, but he headed for the Hōtoku Region in search of JSRT and Flicky. With the loss of both of their Sparkle, he begins his move toward Park Central. While on his way to Park Central, established a way to take back all the Sparkle and memories he had taken away. Regardless of the desperate resistance of the Friends, he entered Park Central and took the information that Kako had, but on the contrary, the strategy was set up by Kako, who knew the Cellien Queen's information. Alex would then be completely destroyed by, who had regained everything.

Trivia

 * Like Flicky and Mary, the name is believed to have its origin in SEGA's retro game "Alex Kidd".