Contact Dermatitis: This is a likely diagnosis given the presence of mild redness and swelling on the ear pinnacle without pain, bump, or drainage. It could be due to an allergic reaction or irritation from an external agent such as earrings, soap, or lotion.

Eczema (Atopic Dermatitis): This condition can cause redness and swelling, especially if the individual has a history of atopic diseases. The absence of pain and other symptoms does not rule out eczema.
Irritant Dermatitis: Similar to contact dermatitis, irritant dermatitis can occur due to exposure to substances that cause skin irritation, leading to redness and swelling.
Seborrheic Dermatitis: Although more common on oily areas of the body, seborrheic dermatitis can occasionally affect the ears, causing mild redness and swelling.

Cellulitis: Although the question asks if this would be considered cellulitis, and the symptoms are mild without pain or systemic signs, cellulitis is a bacterial infection of the skin that can present with redness and swelling. It's crucial to monitor for signs of infection, especially if the condition worsens or if systemic symptoms develop.
Erythema Migrans (Lyme Disease): If the individual has been exposed to ticks, erythema migrans, the rash associated with Lyme disease, could be considered, although it typically presents as a distinctive "bull's-eye" rash.

Relapsing Polychondritis: A rare autoimmune disorder that can cause cartilage inflammation, leading to redness and swelling of the ears, among other symptoms.
Sarcoidosis: A condition that can affect multiple parts of the body, including the skin, and might cause lesions or rashes, including on the ears, though this would be an uncommon presentation.
Discoid Lupus Erythematosus: A chronic skin condition of sores with inflammation and scarring favoring the face, ears, and scalp but can be considered in the differential for persistent or worsening lesions.