Isekangaroo
Spoiler Warning: Spoilers for RobiHachi may follow.
The Isekangaroo is an animal specific to Isekandar which has been turned into a mascot advertising the planet. The widely-broadcast ad of Isekandar has several Isekangaroos dancing in it, it’s possible to buy plushies of it, and there are also people in Isekangaroo bodysuits promoting the planet and serving as a tourist attraction. Upon obtaining the perfect result in a quiz sent to those approaching Isekandar, one wins a tour guided by Mr. or Ms. Isekangaroo.
The bags in which the Akafucrystals are to be stored are made from real Isekangaroo pouches. Though it is kept a secret from the public, the animals are said to be brought in from another planet, not native to Isekandar.