In terms of features

because new features cannot be introduced only the synchronization rate is given

So you can collect those with different personalities. Don't hurry to release them. It's much easier to choose pets in the future. Hypnosis / moonlight + meditation + mental interference + shadow ball personality: conservative characteristics: the synchronization rate can be enhanced by meditation after hypnosis or reinvigorated by moonlight after meditation. I prefer the latter. This department is lean and adds shadow balls to supplement the attack surface (it is said that the attack skills of dream eclipse are really poor).