Utilities and extensions of various Magma intrinsics plus intrinsics for efficiently working with Conrey characters and their Galois orbits, integrated with Magma's built-in support for Dirichlet characters, an intrinsics for working more efficiently with subgroups of GL(2,Z/NZ).
You can create the Dirichlet character with Conrey label 13.3 in the Galois orbit with LMFDB label 13.c using either chi:=DirichletCharacter("13.2"); or chi:=DirichletCharacter(13.c); and you can recover these labels using ConreyLabel(chi) or CharacterOrbitLabel(chi).
To use this package add AttachSpec("somewhere/magma.spec") to your Magma startup script.