The term "most cherubical" is an unusual phrase that is likely to be unfamiliar to many people. However, there are a range of synonyms and similar terms that can be used to convey a similar meaning. For example, words like "angelic," "seraphic," "heavenly," and "ethereal" could be used to describe something that is pure, innocent, or divine in nature. Alternatively, terms like "innocent," "naive," or "childlike" might be used to refer to someone or something that is sweet and innocent in demeanor. Ultimately, the specific word or phrase chosen will depend on the context in which it is used and the nuances of the intended meaning.