El libro Total English - Intermedio Alto - Unidad 6 - Vocabulario

someone who does not express emotions and is considered unfriendly

antipático, odioso

a tough person who is not easily affected by emotions

a person or thing that causes one great annoyance or a lot of difficulty

used to refer to an individual with a positive intention to do good things and help other people

difficult to manage or deal with because of complexity or inconvenience

embarazoso

someone who is likely to succeed because of their ambitiousness or capabilities, particularly in their career or education

persona con ambición

a person who actively avoids having any interaction with others

solitario, ermitaño

someone who is difficult to please or deal with, and is often demanding or critical in their expectations

cliente difícil, cliente exigente