daggerheart/templates/sheets-settings/companion-settings/details.hbs

<section
    class='tab {{tabs.details.cssClass}} {{tabs.details.id}}'
    data-tab='{{tabs.details.id}}'
    data-group='{{tabs.details.group}}'
>
    <fieldset class="one-column">
        <legend>{{localize 'DAGGERHEART.GENERAL.basics'}}</legend>
        <div class="nest-inputs">
            {{formGroup systemFields.evasion value=document._source.system.evasion localize=true}}
            {{formGroup systemFields.resources.fields.stress.fields.value value=document._source.system.resources.stress.value label='DAGGERHEART.ACTORS.Companion.FIELDS.resources.stress.currentStress.label' localize=true}}
            {{formGroup systemFields.resources.fields.stress.fields.max value=document._source.system.resources.stress.max label='DAGGERHEART.ACTORS.Companion.FIELDS.resources.stress.maxStress.label' localize=true}}
        </div>
        <div class="form-group">
            <div class="form-fields">
                <label>{{localize "DAGGERHEART.ACTORS.Companion.FIELDS.partner.label"}}</label>
                <select class="partner-value" name="system.partner">
                    {{selectOptions playerCharacters selected=document._source.system.partner.uuid labelAttr="name" valueAttr="key" blank=""}}
                </select>
            </div>
        </div>
    </fieldset>
    <button type="button" data-action="levelUp" {{#if (not document._source.system.levelData.canLevelUp)}}disabled{{/if}}>{{localize "DAGGERHEART.GENERAL.levelUp"}}</button>
</section>