ナンシーはとても陽気でかわいらしい性格だ。

Nancy has a very lively and sweet temperament.

ナンシーはとても陽気(ようき)でかわいらしい性格(せいかく)だ。

Nanshi- wa totemo yōki de kawairashii seikaku da.

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

迚も (とても、とっても)

very; awfully; exceedingly; (not) at all; by no means; simply (cannot)

陽気 (ようき)

cheerful; jovial; merry; lively; weather; season; spirit of yang

だ (だ)

be; is; indicates past or completed action; indicates light imperative

可愛らしい (かわいらしい)

lovely; sweet

性格 (せいかく)

character; personality; disposition; nature

Readings: ヨウ、ひ

Meanings: sunshine, yang principle, positive, male, heaven, daytime

Readings: キ、ケ、いき

Meanings: spirit, mind, air, atmosphere, mood

Readings: セイ、ショウ、さが

Meanings: sex, gender, nature

Readings: カク、コウ、キャク、ゴウ

Meanings: status, rank, capacity, character, case (law, grammar)