Because she is a teammate, not a tool, and teammates have names. You do not 'run a query against' a colleague; you ask Heidi. The name sets the relationship the product is built around.
Everything about Heidi follows from treating her as a colleague: she works in your channels, speaks up on her own, earns trust like a new hire would, and shows her work.
Tools get adopted by mandate. Teammates get adopted by usefulness. The name is a promise about which one this is.