You may have confused from getting character shards as the character in whole.
You must collect the required amount of shards in order to summon each character Follow the following steps on how to check the number of shards you possess
1) Click on the cellphone icon in the main screen > [Bag] > [Materials]
2) Check the numbers of shards needed to unlock for each character For any other
troubleshooting, please contact customer service with your issue.
*To contact customer service: Click on the cellphone icon in the main screen > [Settings] > [Information] > [Customer Center]