What is the Twitter handle for 望月けい?

望月けい posts on Twitter (X) as @key_999. The profile is at x.com/key_999, and the View on X button at the top of this page opens it.

How many followers does 望月けい have on Twitter?

望月けい (@key_999) has 1,096,207 followers on Twitter (X). The count is refreshed continuously from public data.

When did 望月けい join Twitter?

望月けい joined Twitter (X) in July 2010. The @key_999 account is 16 years old. Searches for 望月けい age often mean a personal age, which we do not publish. The figure here is the account age only.

望月けい Twitter (X) Account Stats

@key_999

JapaneseTier S

View on X

#369 in Japanese

お仕事のご連絡▶︎[email protected]Account age: 16 years (joined July 2010)x.com

望月けい is on Twitter (X) as @key_999, with 1,096,207 followers and 67,126 posts. A typical post draws 3.2K interactions, an engagement rate of 0.288% per follower. It has been on X since July 2010, an account age of 16 years.

Followers

1.1M

Growth (7d)

Following

748

Influence

2.1K

Posts

67K~11.3/day

Likes given

17K

Media posts

2.1K

Follower ratio

1.5K:1

Insights

Its strongest tracked day added +14 followers on Jun 24, 2026.

Engagement

Per follower

0.288%

of 1.1M followers

Per impression

0.969%

326K views on a typical post

Reach

29.7%

of its followers see a post

Typical post

3.2K

interactions (median)

Saved

0.148%

482 bookmarks on a typical post

Posting rate

1.97/day

active 60% of days

Peak time

09:00 UTC

Sunday

A typical post picks up 3.2K interactions against 1.1M followers, an engagement rate of 0.288%. Posts are seen about 326K times each, and 0.969% of those impressions turn into an interaction. That is about 29.7% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 2 posts a day over the last 30 days, with activity on roughly 60% of days.

Measured over 13 original posts from a 30-day window, last computed on October 28, 2026. Recurring tags: #ツイステ, #リボンヒーロー, #望月けい.

Full engagement report

Follower growth

2026-06-23+14 over 2 days2026-06-24

Best tracked day: +14 followers on 2026-06-24.

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Bio

kei Mochizuki / Illustrator アニメと絵が好きです ▶︎ アニメ「リボンヒーロー」/ LOOPERS / 第四境界 / レーミク2025 / FGO「バーヴァンシー」/ 刀剣乱舞「京極正宗」/ サンリオ「シエロモート」キャラデザ

Notable followers

The biggest accounts in our directory following @key_999.

杉田智和/アジルス2.1M まふまふ2.0M 葛葉1.8M 兎田ぺこら👯‍♀️ホロライブ3期生1.8M Mori Calliope💀1.6M

望月けい on Twitter (X) - frequently asked questions

What is the Twitter handle for 望月けい?: 望月けい posts on Twitter (X) as @key_999. The profile is at x.com/key_999, and the View on X button at the top of this page opens it.
How many followers does 望月けい have on Twitter?: 望月けい (@key_999) has 1,096,207 followers on Twitter (X). The count is refreshed continuously from public data.
When did 望月けい join Twitter?: 望月けい joined Twitter (X) in July 2010. The @key_999 account is 16 years old. Searches for 望月けい age often mean a personal age, which we do not publish. The figure here is the account age only.