Su hermana también me cae bien; es trabajadora y bastante modesta.

I like her sister too; she is hardworking and quite modest.

Breakdown of Su hermana también me cae bien; es trabajadora y bastante modesta.

• yo: I
• ser: to be
• me: me
• también: also

Questions & Answers about Su hermana también me cae bien; es trabajadora y bastante modesta.

What exactly does me cae bien mean?

Caer bien is a very common Spanish expression meaning to like someone / to find someone likable / to get a good impression of someone.

So Su hermana me cae bien means that the speaker likes the sister as a person.

A useful contrast:

• Me gusta su hermana = I like his/her/your sister
  • This can be neutral, but it can also sound more like attraction depending on context.
• Su hermana me cae bien = I like his/her/your sister; she seems nice to me
  • This is clearly about personality and your impression of her.

Why is there a me in me cae bien?

Because the structure is:

• alguien le cae bien a alguien

Literally, it works something like someone falls well to someone, but that literal meaning is not how you should understand it. The important thing is:

• me = to me
• te = to you
• le = to him/her/you
• nos = to us
• os = to you all (common in Spain)
• les = to them/you all

So:

• Me cae bien = I like him/her
• Te cae bien = You like him/her
• Nos cae bien = We like him/her

In the sentence, Su hermana is the person who is liked, and me shows who likes her.