הסופרת הזאת כותבת על אנשים רגילים, ובכל זאת כל דמות שלה מעניינת.

In Hebrew, demonstratives like this and that usually come after the noun:

• הספר הזה = this book
• הילדה הזאת = this girl
• הסופרת הזאת = this female writer / this author

So the normal pattern is:

the + noun + this/that

This is one of the first word-order differences English speakers have to get used to.

That is just how standard Hebrew works with nouns plus demonstratives.

You normally say:

• הספר הזה
• העיר הזאת
• האנשים האלה

So the noun takes the definite article ה־, and then the demonstrative comes after it.

Even though English does not say the this author, Hebrew does use the definite article here. So הסופרת הזאת is the normal way to say this author.

Yes. סופרת is the feminine singular form, meaning female writer / authoress / woman author, though in natural English we usually just say author or writer.

Compare:

• סופר = male writer / author
• סופרת = female writer / author

Because the subject is feminine singular, the verb later is also feminine singular: כותבת.

כותבת is the present-tense feminine singular form of to write.

Hebrew present tense is built from participle-like forms, and it agrees with gender and number:

• כותב = he writes / is writing
• כותבת = she writes / is writing
• כותבים = they write (masculine/mixed)
• כותבות = they write (feminine)

Since הסופרת is feminine singular, the sentence uses כותבת.

It can mean either one, depending on context.

Hebrew present tense often covers both:

• she writes
• she is writing

In this sentence, because it describes a general habit or style, writes is the more natural English translation.

Because the sentence is talking about ordinary people in general, not a specific group already known to the listener.

So:

• על אנשים רגילים = about ordinary people
• על האנשים הרגילים = about the ordinary people

Also notice adjective agreement:

• אנשים = masculine plural
• רגילים = masculine plural adjective

Hebrew adjectives usually come after the noun and match it in gender, number, and definiteness.

ובכל זאת is a very common connector meaning something like:

• and yet
• nevertheless
• all the same
• even so

It is made of:

• ו־ = and
• בכל זאת = nevertheless / despite that

So the sentence first gives one idea, then introduces a contrast:

She writes about ordinary people, and yet every character of hers is interesting.

Because כל + singular noun often means every.

So:

• כל דמות = every character
• כל ילד = every child
• כל יום = every day

This is very common in Hebrew. Even though English sometimes prefers a plural idea like all her characters, Hebrew often uses כל with a singular noun to express each/every.

Modern Hebrew very often expresses possession with של plus a pronoun:

• שלי = mine / my
• שלך = yours
• שלו = his
• שלה = hers / her

So:

• דמות שלה = a character of hers / her character

In more formal or literary Hebrew, you may also see a suffix form like דמותה. But in everyday modern Hebrew, דמות שלה is very natural and common.

Because דמות is a feminine singular noun, and the adjective must agree with it.

• דמות = feminine singular
• מעניינת = interesting (feminine singular)

Compare:

• ספר מעניין = an interesting book
• דמות מעניינת = an interesting character

So the agreement is completely regular.

In Hebrew, the verb to be is usually not expressed in the present tense.

So Hebrew says literally:

• כל דמות שלה מעניינת
• every character of hers interesting

But in English we must say:

• Every character of hers is interesting.

This is a basic feature of Hebrew nominal sentences in the present tense.

Yes, but the nuance would be slightly different.

• אבל = but
• ובכל זאת = and yet / nevertheless / even so

ובכל זאת sounds a bit stronger and more expressive. It emphasizes that the second part is true despite what you might expect from the first part.

So here it nicely conveys:

She writes about ordinary people, yet even so every character is interesting.

Yes—this sentence is a good example of how often Hebrew agreement appears.

You can see it in several places:

• הסופרת = feminine singular
• הזאת = feminine singular demonstrative
• כותבת = feminine singular verb form
• אנשים רגילים = masculine plural noun + adjective
• דמות = feminine singular
• מעניינת = feminine singular adjective

So one sentence shows three major Hebrew patterns at once:

1. noun + demonstrative agreement
2. subject + present-tense verb agreement
3. noun + adjective agreement

That is one reason this sentence is very useful for learners.