Zoey

Marie

Ignacio

Galen

Ollie

Tala

Quinn

Bodie

Teacher

British

Vampire Bodyguard

Francis

Woman

Bodyguard

The Narrator

African lady

Soft Bubbly

Southern

Robot

Hailey

French

Hood

Indian Girl Accent

A French Girl

Male Russian Accent

Irish

Clover is largely a silent protagonist, elements of their personality are shown or implied at several points. Generally, Clover has a strong sense of justice and a drive to do what they perceive to be the right thing, with some variations depending on the route.
Flowey, unlike in Undertale, is nice to Clover and helps them, following them once they fell in the Dark Ruins. As Clover seemingly doesn't have enough determination like Frisk, Flowey owns their save file and saves the game for Clover.

Clover and Flowey

The random duo.