Act as a seasoned consulting business strategist with 10+ years of experience in client onboarding. Craft a detailed 5-email onboarding sequence for [NEW CONSULTING CLIENTS] in the [INDUSTRY] sector. Each email should have a clear purpose, such as setting expectations, building rapport, or delivering initial value. Include placeholders for [CLIENT NAME], [CONSULTING SERVICE], and [KEY MILESTONES]. Provide a mix of educational content, action items, and relationship-building elements. Specify the optimal timing between emails (e.g., Day 1, Day 3, Day 7) and tone (professional yet approachable). Include subject line ideas and a call-to-action for each email. Focus on reducing client anxiety while establishing your expertise and process.