You can naturally understand the whole story through quests.
And various rewards and character cards can be obtained every time you clear the Recruitment quests.

[3] Investigate the Haunted Mansion and Defeat the Monsters Inside

Quest information
Start NPC Auch Pioneering Officer
zone Mansion of Dr. Torsche
Objective Go to the Mansion of Dr. Torsche and collect 3 Seals of the Pioneer LV 5
Basic rewards 40 pcs Shiny Crystals
Item rewards 10 pcs Potion of Steroid (Event)
Quest walkthrough

Eleonore will then ask you to go to the Mansion of Dr. Torsche to defeat the monsters there and collect 3 Pioneering Tokens Level 5

To go to the Mansion of Dr. Torsche, go to the Waypoint at the City of Auch and choose Mansion of Dr. Torsche, Savage Garden
After warping to the Savage Garden, go inside the mansion
< Location of the Mansion of Dr. Torsche, Reception Hall entrance, H-5 >
When you are inside, talk to any Pioneering Merchant at the entrance and take their quest.
You should receive and finish at least three quests from the Pioneering Merchant of your choice

After defeating the required number of monsters, go back to the Pioneering Merchant where you got the quest and complete the quest to receive Pioneering Token Level 5. Go back to Auch using the Waypoint outside Dr. Torsche Mansion.


Return to Eleonore. Give her 3 Pioneering Tokens Level 5 and she will give you your next task. She will reward you with a Potion of Steroid

Rewards: 40 pcs Shiny Crystals, 10 pcs Potion of Steroid (Event)