Beloukas

Devil of Shield Arc
c1-78

Cal Mira Island Arc
c78-114

Spirit Turtle Arc
c115-130

Slave Supremacy Arc
c131-203

Name this arc something pls
c204-357

Towards the Legend Arc
c357-378

The Christmas of Shield Hero
c379-385

The Valentine of Shield Hero
c386-402

The White Day of Shield Hero
c403-409

Loop 1 to 3 - Tutorial Arc
Motoyasu goes to the Slave merchant's shop looking for ""Firo-tan", but since she hasn't been hatched yet the Slave Dealer can offer him Phiolorial eggs. The Slave Dealer sells Motoyasu an egg which ends up hatching into Kuro. c410

Loop 4 - Silt Welt Arc
c415-455

Loop 5 - Melromarc Arc
c456-574

Loop 6 - Foburei Arc
c575-current

Heroes
Iwatani Naofumi Kitamura Motoyasu

Other
Raphtalia Firo Kiel Taniko Imia

Trivia

 * As Naofumi himself references upon meeting him in the WN, the Slave Merchant very closely resembles the Millenium Earl from D.Gray Man.