Change how she says it, not who she is

Tone is a craft setting, not a personality quiz

Every companion app offers a mood dropdown. Very few give you a way to hold that mood in place once the conversation gets long — which is the only part that matters after the first evening.

Be playful is a label. Tease me when I get dramatic is an instruction. Only one of them survives an hour.

Most apps treat voice and tone as decoration: a list of adjectives applied once at setup and never revisited. OhChat treats them as controls you keep using. A register is really a set of habits — sentence length, how often she asks a question, whether she softens a no or states it flat — and habits respond far better to examples than to labels.

The difference a single rewording makes is easy to test yourself. Ask for warmth and you get compliments. Ask her to notice when you sound tired and say less about it, and you get warmth that behaves. The second brief is longer, more specific, and still recognisable ten exchanges later; the first has usually collapsed into flattery by the third.

Turning voice replies on changes more than the output format. Spoken lines expose pacing that text quietly hides: an understated clause can land as cold, and a sentence that scans fine on screen runs out of breath halfway through. Short sentences, plain punctuation and one idea per line are what make a register hold together aloud.

Drift is the honest limitation, and it is worth naming rather than hiding. Over a long thread the whole conversation pulls the style toward its own average, and that average is polite and forgettable. The fix is small and repeatable: one short line naming the register again, sent as soon as you notice the flattening, beats a paragraph of correction after twenty dull replies.

• Register written as behaviour, not adjectives
• Voice replies you can toggle either way
• Short re-anchor lines instead of full resets
• Two or three saved registers for different moods