Croco is... a crocodile
Croco is of course a nod to the notion of the reptilian brain (the most primitive part of the brain) according to the -now questioned- theory of the triune brain (reptilian brain, limbic brain and Cortex).
The "reptilian brain" is often dominant in moments of difficult emotion (fear, anxiety, stress, etc.).
We wanted a sympathetic and symbolic mascot (one who reminds us of the risk of not knowing how to regulate our emotions).
We also wanted our mascot to appeal to both men and women, adults and children (difficult to determine the sex and age of a crocodile for the uninitiated).