Field edition in odoo which is specific to a record should be saved on that record, soFor record fields, templates can use a special t-field directive which allows editing the field content from the website using field-specific interfaces. Change the person template to use t-field and for example you can see below code and you can use it in .py and .xml file in Odoo module.

demo.py
    _name = 'academy.demo'

    name = fields.Char()
    biography = fields.Html()
academy/templates.xml
                <div class="oe&#95;structure">
                    <div class="container">
                        <h3><t t-esc="test.name"></t></h3>
                        <div><t t-esc="demo.biography"></t></div>
                    </div>
                </div>
                <div class="oe&#95;structure"></div>