Tough Door

A spirit that appears with a strange door that guides people it likes to further increases in HP. A certain researcher is said to have succeeded in making them appear, but until then there were virtually no sightings of them. There are reports of them appearing with doors that suddenly materialized out of nowhere, but this being so fantastic, there are few that actually believe them.

Quotes
Background Story=

Background Story
Fusion=

Fusion
Awakening=

Awakening
None Summon=

Summon
Trust Mastery=

Trust Mastery
None

How to obtain
Reward
 * Exchange Red Star Quartz with Theo's Workshop.