Blackberry Marshmallow is a fluffy ideology representing strong friendship bonds and self-improvement. It likes to look at the achievements of others to replicate them itself.
It believes that friendships are like bundles of sticks: it is easy to break one stick, but a bundle is almost unbreakable! Because of that, Blackberry Marshmallow tries to have as many friends as possible.
Despite the overall friendliness, Blackberry Marshmallow is very shy, and is afraid of others that differ from itself too much. It oftenly tries to hide from social interactions with strangers. Only well-known friends can make the Blackberry Marshmallow come out of its home.