When Mareanie sees James' purple face after he gets poisoned by it, it has a strong affection on him, even blushing red. Also, it likes to grab his head using its tentacles.
Mareanie first appeared attacking James because it wanted to eat his Corsola-shaped helmet, but later felt disappointed when it found out that it was only a helmet. After Jessie, who was attacked by its tentacles, gave James a push, it poisoned him, causing him to look like another kind of its species. Thus it blushed and started to chase him, much to his dismay.