Tiu rolulo estas amuza.

Tiu is a demonstrative word: it points something out, like English that.

In Tiu rolulo, it works like an adjective modifying rolulo, so it means that character.

A useful contrast:

• tiu = that
• ĉi tiu = this

So:

• Tiu rolulo = that character
• Ĉi tiu rolulo = this character

Because tiu already does the job of identifying the noun.

In Esperanto, you normally do not combine la with demonstratives like tiu. So:

• tiu rolulo = correct
• la tiu rolulo = not normal Esperanto

Also, Esperanto has:

• a definite article: la
• no indefinite article like English a/an

So tiu by itself is enough.

Literally, rolulo is built from:

• rol- = role
• -ul- = a person characterized by something
• -o = noun ending

So rolulo is literally something like a role-person.

In actual use, it means character, personage, or someone defined by a role. In stories, films, games, and similar contexts, rolulo is a common word for character.

-ul- is a very common Esperanto suffix meaning person characterized by... or person with...

Examples:

• junulo = young person
• riĉulo = rich person
• belulino = beautiful woman
• rolulo = character / role-based person

So when you see -ul-, think: a person of that type.

Estas is the present-tense form of esti, which means to be.

Esperanto verbs do not change for person:

• mi estas = I am
• vi estas = you are
• li/ŝi/ĝi estas = he/she/it is
• ili estas = they are

So estas always means am / is / are, depending on the subject.

In this sentence, it links the subject Tiu rolulo with the description amuza.

Because amuza is an adjective, and Esperanto adjectives end in -a.

Here it describes the subject:

• rolulo = noun
• amuza = adjective

So the pattern is:

• noun + estas + adjective

Examples:

• La domo estas granda.
• La libro estas interesa.
• Tiu rolulo estas amuza.

If the noun were plural, the adjective would also become plural:

• Tiuj roluloj estas amuzaj.

It means amusing, funny, or entertaining — something that causes amusement.

So amuza rolulo is a character who makes people laugh or feel entertained.

If you want amused in the sense of feeling amusement, you would usually use amuzita:

• Li estas amuzita. = He is amused.
• Li estas amuza. = He is amusing / funny.

That is an important difference:

• amuza = causing amusement
• amuzita = feeling amusement

Because there is no direct object here.

This sentence has:

• a subject: Tiu rolulo
• a linking verb: estas
• a predicate adjective: amuza

After esti and other linking verbs, the describing word is not a direct object, so it does not take -n.

So:

• Tiu rolulo estas amuza. = correct

Not:

• Tiu rolulo estas amuzan. = incorrect

And rolulo also has no -n because it is the subject, not an object.

Yes, Esperanto word order is fairly flexible, but the normal, neutral order here is:

Tiu rolulo estas amuza.

That is the most straightforward way to say it.

You could change the order for emphasis, for example:

• Amuza estas tiu rolulo.

That puts more focus on amuza, but it sounds more marked or stylistic. For a learner, the original order is the best default.

Yes. Rolulo by itself is gender-neutral.

It can refer to a character of any gender unless the context makes it clear.

If you specifically want to mark feminine, Esperanto can use -in-:

• rolulino = female character

But in many cases, plain rolulo is enough and does not force a male meaning.

A careful pronunciation would be roughly:

TI-u ro-LU-lo ES-tas a-MU-za

A few helpful points:

• tiu has two syllables: ti-u
• stress in Esperanto is always on the second-to-last syllable
• z is pronounced like the z in zoo
• every written vowel is pronounced clearly

So the stress falls on:

• TI-u
• ro-LU-lo
• ES-tas
• a-MU-za