Bauru in Brazil can be moderately safe for solo female travelers. While, generally, locals are welcoming and Brazilian culture is vibrant and captivating, it's always necessary to maintain vigilance, especially at night or when in less crowded areas. Use of public transport during daylight and maintaining a low profile can limit chances of any mishappenings. It's also advised to keep your belongings securely and avoid showcasing expensive items in public. As in any other city, stick to touristic and well-lit areas, and always keep the contact of local authorities at hand.