This is an interesting riddle However, judging from the description of the riddle, there may be a few zodiac signs that are more consistent. Rabbits, for example, are generally considered to be relatively fresh and natural animals, and rabbits are also more vigilant. They usually give a fresh and natural feeling, and rabbits are also very vigilant, which is more consistent with the description of "fresh and natural and alert". Rabbits are also often given some symbolic meanings in culture, such as gentleness, kindness, agility, etc.
There are also monkeys, which live in a natural environment, are agile and have a certain vigilance. Monkeys are also very interesting animals. They are active and live in a natural environment, which is in line with the feeling of "freshness and naturalness". Monkeys are also highly vigilant, which allows them to survive and thrive in nature. The monkey is also often used to symbolize intelligence, wit, and flexibility. Just like monkeys, we need to be alert and flexible in our lives.
Of course, these are just some possible guesses, and each zodiac sign has its own unique characteristics, and the answer cannot be determined by a riddle alone.