Most of girls joins you after finishing your movement phase in a tile of certain biome.

Cami - plains (green). Zaria - beach (sand). Talia - aquatic (blue). Lia - forest (dark green with tree). Kinwa - swamp (dark green).

Oriana joins you after you free her from her coffin by exploding it with tnt in a drilling minigame. I could find coffin only in mountain (white) area.

silvia can be found from question mark blocks sonetimes when drilling

and a wolf I forgots name can be got from having patreon edition

i only needed 1 more character i have talia, lia, zalia, cami, oriana, kinwa,  and silvia

how to find the dragon?

isn't there a new room after u get all the characters because I'm wondering if that's a new character