The Tirios Lacruna has a stance similar to other Leviathans, however its legs are way better adapted for swimming than for walking. Due to this, it stays in water most of the time and attacks while under water. However, when on land it moves around less like a crocodile and more like a seal - sluggish and slow.
Its hide has many vibrant colours, varying from a deep blue to a flashy turquoise and even yellow on its tail fin.
The Tirios has a wide variety of breath attacks, thanks to multiple sacs found in its body. The first known combination of brute wyvern and leviathan, little is known about all of this monster's abilities. It is said that all of its breath attacks are channeled through its horn before being emitted. If the horn is broken, the attacks become useless.
It has two modes, the Water and the Land Mode. While in the Water Mode its hide is bright and it is soaking wet. Like some kind of fish, it can secrete a substance that turns the water into slime. The Tirios Lacruna uses this slime to move around quickly and slither around on it. This makes its attacks faster and its movements more agile. However, this mode does not last forever. While not in the water its hide slowly dries and hardens. While in Land Mode its attacks are far slower - they deal more damage and are heavier - and so are its movements.
Quite territorial, the Tirios Lacruna is the natural rival of the Kawagashi, fighting them for food and turf. Its eggs are quite small, therefore very hard to find. However, adolescent Tirios grow at incredible rates. Villages can become infested with them in mere weeks.