MBTI Personality Analysis
The strongest MBTI estimate for Bella Swan is ISFP. This is because she makes sense of the world mostly through personal experiences, feelings, and close relationships.
One trait often seen in the ISFP profile is appearing calm and in the background on the outside while carrying a very intense world of values and emotions within. Bella fits very closely into that pattern.
Her decisions are often shaped less by logical calculations of safety and more by inner attachment, loyalty, and the weight of what she feels.
Enneagram Personality Analysis
On the Enneagram side, 9w8 seems like a strong possibility. The reason is that Bella protects her desire for peace, unity, and not being separated with a stubborn and resilient attitude when necessary.
While the Type 9 side makes her conflict-avoidant, calm, agreeable, and inclined to merge with the people she loves, the 8 wing creates unexpected endurance and backbone beneath her seemingly passive exterior.
This combination creates a 'quiet but unyielding' structure in Bella: soft on the surface, but surprisingly resistant when her bonds are at stake.