The Monk Familiar behaves closer to an RP familiar in terms of combat behavior, as it attacks from range rather than positioning itself as a melee tank.
Based on in-game testing, it does not use exeta. Instead, it contributes through offensive abilities.
It appears to use several different types of attacks:
- A chain-style attack.
- A claw-type attack.
- Spells that seem to deal physical, earth, and energy damage.
This suggests its role is more offensive and supportive at range, rather than functioning as a main or secondary tank.
The familiar follows the player across floors and can go through portals and holes, although it does not enter every boss room (for example, it does not enter the Sugar Daddy portal).
At the moment I couldn't find any official information about its behavior, so some of this information is based on direct in-game observation.